fluff out the window:
Dwarfs - Gunline troops will compliment your stompy ogre nicely, with the added bonus of major magic protection, high T troops with bloody good armour will work well with ogres. ALso gives your ogres some of the best warmachines in the game!
Chaos Warriors - lots of solid units, a few units of mauraders will give your ogres some numbers very cheaply and IMO marauders ore the best unit in the game for thier points cost, especially with great weapons. I unit of PROPER elite infantry too such as a unit of chosen will really sharpen the sword of your ogres. some really good magic in thier too, tzeentch sorcerers are NASTY
Lizardmen - High T troops will work well alongside ogres and even out your numbers, big gribbly such as a stegadon, whats not to love with them, skinks will give you some skirmishing troops with poison weapons that frequently cause me issues when i play them...oh and magic ....... LM magic is IMO one of best in game
High elves - ASF first troops are NAILS in cc...poroviding they dont fluff thier attacks, some seriously strong infantry such as swordmasters of hoeth, complimented by reallly good shooting, and pretty good at magic, though sadly HE magic is not very offensive, great when used defensivly though!
DArk elves - Same as High elves except they lose ASF, however thier initiative is very high so nat always an issue.....except with executioners ( Elves that hit last...never good), good shooting and best of all...hyrdas ftw. really good offensive magic too!
Skaven - on a good day skaven on amazingly amazing, on a bad day they kill themselves with everything they do, some really really good offensive magic, cracks call and skitterleap is a nasty combo, some great Rnf troops will boost your numbers significantly. Some really fun warmachines that potentially could emliminate all that stands in thier way, though sadly they tend to misfire. a lot. Doom whell and abominations are pure dirt though, even with the risk!
Empire - 2nd best shooty army IMO after dwarfs, and its a close call, hellblaster vollygun is potent, magic is varied, and plenty of RnF troops to bump ya numbers, versatile army is empire and very strong when used correctly.
They would be my best choices
