Well, I looked around at wc3sear.ch and heres what I came up with. Please though, at least look through them, it took my a good half hour to find them and then post them here.
Ogres
For the ogres, I pretty much am posting all the models I found for them since there were so few. Some aren't that great, but I don't know exactly what you want so I'll post them anyway.
This one's my favorite.
Ogre Gladiator
This may be a skin.
Ogre Magi
Not the best one, but no custom textures needed for this guy.
Ogre Warchief Hero
These two aren't the best either, still useful though.
Ogre Hero
Ogre Bull
This one is WoW extracted, so technically you're not supposed to use it unless you own a copy of WoW.
Ogre Warlord
This is just an ogre building.
Ogre Mound
Trolls
For the trolls I found a lot more models, so I'm just going to post the good ones and the useful ones.
This ones my favorite, not the best, I just think it's cool.
Mammoth Rider
This model's my second favotire and, in my opinion, the best.
Jungle Troll Skullsplinter
This model's pretty cool, not like most wc3 trolls though.
Finnish Troll
Not the best model, but a cool concept. Think of it as an upgraded bat rider. :wink:
Dragon Rider
Heres two different blademasterish troll models. I like the first one better.
Troll Blademaster
Troll Blademaster 2
The first model would be good for a basic infantry unit and the second one could be an upgraded form, possibley if you keep the troll beserker upgrade throw this guy into it as well.
Troll at Arms
Troll Tracker
This one may be useful for a spellcaster.
Troll Shaman
This model is just cool.
Troll Overlord
Not the best model, but hes definately useful.
Troll Peon
Two buildings that may be useful.
Troll Town Hall
Lumbermill
Good Luck.