All around...CDPR and they are still rising. They are what Piranha Bytes should have been...start small, dream big, make large enough projects that you can handle and then move forward.
Close second...Obsidian...never a love at first sight with their games...but when you see past the rough spots, there is (almost) always, some measure of brilliance in their games.
Bioware...is pretty much a mediocre company, riding on previous glory...they need better writers to open new directions with their games, enough with the "Reapers, Harbinger, Collectors, Darkspawn, Arch/whatever, Old one(s)...already.
Bethesda...not a bad developer, but not a great one either. Poor writing, more and more shallow rpg mechanics with each new game, reliance of poor engine and modders to polish and improve their games, some unethical business practices.
Have nothing against them, though I did enjoy my own Skyrim mod where I had Todd Howard beaten to death with my "Radiant mace of Creativity".