Relic, it is the rts conoisseur's developper of choice:
-Impossible creatures (their first title but uber creative, how many games allow you to have armies of tigershark and giraffegorillas or crabrhinos?)
-Homeworld 1+2. Candidates for best RTS of all time
-Dawn of war series. First dow is the most fun rts I ever played, dow2 just wasnt my cup of tea but still a great game (i hate smale scale rts, same reason i could never get into w3), i just played it for campaign personally.
Company of heroes: This game is....Amazing, thats all i can say about it. So good, it got 2 ex girlfriends into videogaming, and turned a few of my friends into rts gamers.
The upcoming Space marine shows they ain't afraid of trying new genres either (i believe they had 1 other forray in fps, didnt play it though).
And all this from a relatively small company without the independence or luxuries some of the bigger names being flaunted here have.