While blm is the ovbious choice here, it has some way more maintenance with buffs, spells and cooldowns even though the bloat is a bit less.

Worst bloat is by far summoner, it's just disgusting honestly.

Nin actually doesn't have much bloat, a few things can be combined together, it's not bad at all. I've played all the other classes, and darknights are pretty bad with it also.

Blm / nin / and.,,whm? aren't bad for bloat.

Don't do drg.