Aquatic race
So in Monsters of Faerun there is an aquatic humanoid race called the Shalarin (pg. 76). The PGtF web enhancement / monster update booklet says these guys are +0 LA. It also gives them racial stat mods of +4 STR & DEX, +0 to everything else. Wow, not too shabby for a +0 LA race.
But too bad they're aquatic and can't breath on dry land. Oh wait, why not use the Amphibious template. -2 DEX for air breathing is a pretty good deal. So now you have +4 STR & +2 DEX on a +0 LA humanoid.
Throw on Dragonborn and now you've got +4 STR & +2 CON, can breath air or underwater just fine.
I'll take this guy over a Dragonborn Water Orc any day. And chances are, if you have a DM that would actually let you use a Dragonborn Water Orc, he'll probably let you use a Dragonborn Shalarin.
This may be common knowledge, but Shalarin have no land movement rate...so that Dragonborn Shalarin can swim and if she chooses wings, glide, then fly by 6th, but that's it. Neither the dragonborn nor the aquatic templates grant land speeds.
2nd funny story, the water races can't breathe water, but the air races get to survive without air...
Edit: Not wanting to double post...
The Bone Knight PrC in Five Nations (Eberron)...you gain immunity to poison, sleep effects, paralysis, disease, death effects, fatigue, exhaustion, ability damage to your physical ability scores, ability drain, energy drain, and death from massive damage...All you need to get is immunity to charm/compulsion (be an elf or a paladin of freedom), and immunity to polymorph effects and you're like totally wizard proof. ...
Fist of Raziel 1 (BoED) nets you Magic Circle, though if you can't be a Paladin, you probably can't be Exalted. Changeling nets you Shapechanger subtype, for the ability to resume your normal form on your next turn.