I'm a bit surprised that we don't hear much about competitive Ultramarine lists built around Calgar.
Dakka's been flooded with White-Scar lists and tactics posts but not much on the UMs...
HIGHLIGHTS:
Minor buffs and bonuses:
-Gets to roll 3 dices on the Warlord Trait table and picks the one he wants (decent chance at getting Storm of Fire, Imperium's Sword isn't bad either)
-His
CC attacks essentially have tank-hunter
-His armor of antilochus lets you sweep still and incorporates a homing beacon
Serious buffs:
-All your UM units get to CHOOSE to pass or fail any morale checks! This is better than the old combat tactics; the tactical applications to this are awesome
-You get to use one of your doctrines TWICE!

While the tactical doctrine seems like an obvious winner here, the devastator doctrine is the one I usually find myself using the most. It is great against flying
MCs to force those grounding tests, and obviously will come in handy against flyers as well. EITHER of those doctrines are great with plasmaguns and combi-plasmas where you'll maximize your hits or at the very least minimize your "gets-hot" wounds.
Calgar basically allows you to field many relatively cheap tactical and devastator squads (remember, you don't need vet upgrades) and turn them into serious firepower.
Calgar himself is no slouch in
CC with 5 attacks stock (using the
PFs, and let's face it, you're rarely gonna use the sword) and even shoots a couple of AP2 shots from the integrated bolters. He meshes REALLY well with an Honour Guard squad with the chapter banner, let him tank wounds from shooting and overwatch and unleash a crap-ton of attacks during the assault. I've been using this squad in a pod as a harass/distraction unit while the tacticals get in position to unleash hell by turn 2 (and/or 3!)
Anyone else have used Calgar successfully? Or not? Care to comment?