So far I've gotten a normal lawful ending as a dwarf paladin and an ultra ending as a lawful drakish barbarian, both in story mode. I'm almost done "stupidest chaos follower" on a troll chaos knight (again, on story mode) so the only thing that's left is for me to get the Ordinary Chaos God ending.
I'm a fan of melee classes, as the above illustrates (although I've gotten far on a gnomish wizard, and I've played around a little with an archer and an assassin), but I wouldn't mind trying something different. I'm also a fan of extremely specialized characters, so I'm considering troll healer with the candle sign, but that might be too similar to the troll chaos knight I've currently got going. I might give archer or assassin another try, but I have no idea what race to go with. I've also thought about weaponsmith, but it seems like they don't get to actually use their abilities until later in the game, since you need to find a pick axe to get ore and there's no guarantee you'll find a forge.