Fighter's bonus feats?
soulmelds?
edit: out for #321 is the Archdragon. For +4 LA you can get a variety of things.
you gain 3 extra domains if you already have 1 and any innate casting.
you get a 20ft aura and breath weapon changes, based on alignment.
chaotic gets a non-chaotic damaging for 1d6, plus all attacks within the aura, besides yours, take a miss chance (20% for melee, 50% for ranged)
your breath weapon has a glitterdust effect added to whatever old one (will negates)
evil gets an aura that deals 1 Con and Wis/round to non-evils (fort negates) and -4 spot/search to everyone else
your breath also delivers demon fever disease automatically to damaged creatures.
good aura heals good and damages evil and everyone else takes -1 attack/damage
breath also disintegrates undead (Fort negates)
law gets a non-law Doom and all other energy attacks in the aura deal min damage
your breath is antimagic field for 1d4 rounds to anyone damaged by the breath with no extra save!!
I think law is the best followed by evil