No Drago? I am disappoint.
All are good. pVlad is great for a bit of accurate shooting (Behemoth and Conquest love him) due to signs and portents.
Drago in particular is amazing with this and the affinity.
eVlad is an infantry monster. Just use his feat on some Doom Reavers for a good laugh.
Vlad3 admittedly I've never played in tier with him but I've found dash is the way forward for him. Take some already fast units (either Kayazy unit for example) for some silliness.
I'll post some more in depth thoughts later as I'm posting this from my phone.