Quanar wrote:
I'm not sure any of the Chapter Tactics rules are hugely beneficial to Dreadnoughts, but some are obviously more relevant than others, starting with the least helpful (imo):

Raven Guard - Almost no benefit. Only take if the rest of the detachment will make use of the tactics.
Black Templars - Niche benefits here, probably main one is Crusader for mullering units that attempt to flee with the Our Weapons Are Useless rule.
Dark Angels - Dreadnoughts shouldn't overwatch often, and anything that charges them probably isn't afraid of a few pot shots.
Imperial Fists - Bolter Drill only affects the underslung stormbolter, and Siege Masters relies on your opponent taking a building.
Salamanders - Fun with underslung heavy flamers, but that sort of pidgeon-holes you into a drop pod, and you've said you'd rather a support role than a smashy role.
White Scars - The fluff-bunny in you may want to reject this idea, but Hit & Run is a nice perk for something which generally isn't afraid of Overwatch and benefits from the extra attack. Again, not helpful to supporty dreadnoughts though.
Iron Hands - The obvious fluff choice, but slightly hampered by the fact that either your opponent will focus down the dread in a single turn, a luck pen kills it in one go, or you simply forget IWND. Combined with a Techy as the HQ choice, can make it difficult for an opponent unable to take it out in one go.
Blood Angels - Several extra dread types to choose from, but tend to be melee-focused and hampered by having less attacks than a dreadnought from a more recent Codex.
Ultramarines - Semi-useful, particularly if your loadouts haven't gone for twin-linked weapons.

I haven't rated Space Wolves, because I haven't got a clue on them, and I believe Grey Knights lost the upgrade that made their dual-dual-autocannons incredibly popular.

I think I've covered most of the possibilities. Mostly not alot of difference between them but have a think about the rest of the allied detachment too.

 Quanar wrote:
I'm not sure any of the Chapter Tactics rules are hugely beneficial to Dreadnoughts, but some are obviously more relevant than others, starting with the least helpful (imo):

Raven Guard - Almost no benefit. Only take if the rest of the detachment will make use of the tactics.
Black Templars - Niche benefits here, probably main one is Crusader for mullering units that attempt to flee with the Our Weapons Are Useless rule.
Dark Angels - Dreadnoughts shouldn't overwatch often, and anything that charges them probably isn't afraid of a few pot shots.
Imperial Fists - Bolter Drill only affects the underslung stormbolter, and Siege Masters relies on your opponent taking a building.
Salamanders - Fun with underslung heavy flamers, but that sort of pidgeon-holes you into a drop pod, and you've said you'd rather a support role than a smashy role.
White Scars - The fluff-bunny in you may want to reject this idea, but Hit & Run is a nice perk for something which generally isn't afraid of Overwatch and benefits from the extra attack. Again, not helpful to supporty dreadnoughts though.
Iron Hands - The obvious fluff choice, but slightly hampered by the fact that either your opponent will focus down the dread in a single turn, a luck pen kills it in one go, or you simply forget IWND. Combined with a Techy as the HQ choice, can make it difficult for an opponent unable to take it out in one go.
Blood Angels - Several extra dread types to choose from, but tend to be melee-focused and hampered by having less attacks than a dreadnought from a more recent Codex.
Ultramarines - Semi-useful, particularly if your loadouts haven't gone for twin-linked weapons.

I haven't rated Space Wolves, because I haven't got a clue on them, and I believe Grey Knights lost the upgrade that made their dual-dual-autocannons incredibly popular.

I think I've covered most of the possibilities. Mostly not alot of difference between them but have a think about the rest of the allied detachment too.

 MechaEmperor7000 wrote:
I would probably go with a Rifleman Iron Hands dread squad parked in the back raining autocannon fire down on people. Essentially walking turrets, they're decent but not mindblowingly awesome. Being back-field AND having IWND will mean that the opponent will likely never shift them from their position, while their MCs, light vehicles, flyers and non-power armored stuff takes a beating.

 Furyou Miko wrote:
Might I suggest Mantis Warriors?

White Scars successor with a very limited number of Marines due to being on a penitent crusade - so they have quite a few Dreadoughts, because every body matters.

Their chapter tactics don't benefit the Dread directly, but they do let you take a Divination librarian for your allied HQ, which can give the rest of your army some nice advantages.

 Crimson Devil wrote:
Currently in the fluff the White Scars have dreadnoughts. In the Kauyon book a chapter organization chart lists dreadnoughts in every company except 8th and 10th. White Scars had them in their first list; the one written for Paul Sawyer in White Dwarf. They loss them in the Adeptus Astares article. That lasted through the end of 3rd, all of 4th, & part of 5th edition. Until the WD team painted up the starter box as WS for a battle report.

 Furyou Miko wrote:
Might I suggest Mantis Warriors?

White Scars successor with a very limited number of Marines due to being on a penitent crusade - so they have quite a few Dreadoughts, because every body matters.

Their chapter tactics don't benefit the Dread directly, but they do let you take a Divination librarian for your allied HQ, which can give the rest of your army some nice advantages.

Slayer-Fan123 wrote:
The FW Chapter Tactics have some good picks too. Carcharodons give theirs Fear (so kinda like a Monstrous Creature) even though it won't matter most of the time, and can get Rage, which is awesome on an Ironclad (7 attacks on the charge? Yes please!).

Slayer-Fan123 wrote:

 Furyou Miko wrote:
Might I suggest Mantis Warriors?

White Scars successor with a very limited number of Marines due to being on a penitent crusade - so they have quite a few Dreadoughts, because every body matters.

Their chapter tactics don't benefit the Dread directly, but they do let you take a Divination librarian for your allied HQ, which can give the rest of your army some nice advantages.

The whole codex gets Divination access now. The Chapter Tactics need an update as a whole.