All right, this will be a giant wall of text and builds. Forgive me, but I love explaining builds and my reasoning for them (although they should be fairly straightforward and in most cases standard). I will list some alternatives if needed. I will set all weapons and mods, etc to max, just to keep things simple.
Adepts:
Asari (original)-
http://kalence.drupa...!!23N55383!FFDA
So this build is rather simplistic. This character is the only one that I feel I can spec into stasis. SInce this character doesn't get much from fitness (21 points spent only to get ~325 extra health and shields) so you might as well stay at a distance, snipe, and make it even better with stasis. Add in the fact you have 3 follow up shots, a quick reload, warp ammo goodness to pair with an enemy trapped in stasis (or affected by warp) and you got one great biotic sniper. Throw is great for those "oh crap!" moments, and to detonate BEs, should the situation arise. The gear bonus and mods for the valiant are really up to you. Also, feel free to grab thr acolyte or hurricane for a side arm.
Asari Justicar-
http://kalence.drupa...!23N52383!.DF9G
Top favorite biotic. Hands down. Now, yes, she doesn't benefit much from fitness that much more than the stock asari, but she does get more barriers, so I find it is worth the points. Besides, biotic sphere (while it is still a great power) didn't seem quite neccessary. Besides, since mooks are a pain in the rear, the acolyte, pull, reave combo is absolutely perfect. The gear is up to you, also feel free to add in a shotgun or other such side arm (I like the wraith, every once in a while).
Batarian Slasher-
http://kalence.drupa...!23N53383!.FF9G
Okay, second favorite adept. Destroyer of all things armor. Warp, shoot twice with wraith, cluster genades, laugh, pose and you're done. Gear, is up to you.
Soldier
Krogan soldier-
http://kalence.drupa...!23O53363!A.F9G
I'm surprised you don't use this guy more often. You essentially never die, you have inferno grenades (which kill incredibly fast over time, and pairing it with a follow up shot with incendiary shot claymore, just watch as their armor falls to nothing! Pretty much any other shotgun will work, by the way.
Batarian Soldier-
http://kalence.drupa...!23O51363!94F95
Just like the krogan, except now you have ballistic blades! Blade one guy, inferno nade another, shoot everything with the harrier or other such assault rifle (saber, argus, lancer, wraith, raider, and claymore are all good alternatives).
Vorcha Soldier-
http://kalence.drupa...!33452363!ED5E5
Burn all the things! Fire Explosions everywhere! Also, you barely ever die, so yeah
Destroyer-
http://kalence.drupa...53X51313!8.99GG
Yes, I know you already use the destroyer... but use this build because it is awesome. The destroyer's greatest asset is his massive shields. However, once they are down- he is a dead man. So, make sure they come back quickly... see that shield regen delay? Yes, after you stop taking damage, 1.1 seconds later, your shields are coming back! It is like vorcha health regen, but for shields. The typhoon is for the cool factor (the scoper ensures every bullet goes exactly where the dot of the reticle is, the prothean particle rifle is a far superior weapon on this guy.
Turian Havoc-
http://kalence.drupa...!23O51313!.GGAG
What?! No Havoc Strike?! Using the phaeston?! Yes, this build works, yes you barely ever die (stim packs, already awesome shields, awesome jetpack dodge, cryo to debuff and freeze, and slow annoying mooks), and yes- every bullet of your 90 round phaeston hits the target. You can use any other assault rifle of your choice, or shotgun- I just wanted to show you how awesome this class can be without havoc strike.
Quarian Marksman-
http://kalence.drupa...!23H54313!08.AG
As long as marksman is active, behold as the hurricane becomes a laser beam of headshot death. Enjoy.
Engineer
Quarian Female-
http://kalence.drupa...!23H54363!.EG9G
Explosions everywhere, super durable charcter, debuffs, DoTs, incendiary cheese, and jiggly bum bum. Weapon is up to you
Salarian-
http://kalence.drupa...!23H54363!E.E9G
Same as above (minus explosions everywhere- the priming duration of his powers are very short), weapon is up to you. Also energy drain is amazing.
Geth-
http://kalence.drupa...23H54363!.F8AG9
Also awesome. I'd stick with the hurricane, but weapons like the wraith or even the eviscerator will work.
Turian Saboteur-
http://kalence.drupa...!!23O51333!AE8A
Amazing, trust me. Tech bursts with disruptor ammo and homing grenades (or sabotage tech burst priming and tech vulnerability makes the tech bursts stronger), flamethrower turret and grenades for FEs.
Sentinel
Krogan (original)-
http://kalence.drupa...!23Q56363!G.99D
The more mobile melee krogan, simple as that.
Vorcha-
http://kalence.drupa...!23452363!EDD55
Fire explosions, this time aided by cluster grenades.
Asari Valkyrie-
http://kalence.drupa...!23X53363!EFE55
the better N7 fury. She can dodge quickly, live longer, and she has warp.
Krogan Warlord-
http://kalence.drupa...23553313!GA.9DH
Since he is a lot slower than the stock krogan, I find that I need to hybridize this guy. Your main objective is just to shoot stuff with the claymore. That is all you need to do. However, you'll be even more deadly (and hearder to kill) while you're in rage bonus. So kill a hapless mook with a heavy melee and keep that up and you'll be fine. Just shoot and throw in some melees, you just ned to get into the grove.
I'm just going to stop there, since vanguards truly are annoying off host and you already have the major infiltrators covered, so those are your builds to try... hope you like them!