I don't think he's looking for a 'fluffy' style of gameplay
per-se, he's just looking to use a big 'ole Warlord class Titan in his games, which is difficult to do at all if you're using the stock Black Legion army list, unless you completely abandon points costs or something.
That's why I suggested the ERC mods as IIRC they've attempted to make the Banelord Titan a more appealing choice.
EDIT:
I looked up the ERC changes an I was wrong... they made the Ravager Titan cheaper, not the Banelord. My bad.
Still, I think Ogre44's had some good advice here (like taking Obliterators because they're teh awesome), and I think an army led by a Banelord would look awesome.