BI is one of the best in this moment, and its Arma3 is on Top10 games on Steam. Reffering to flashpoint and TakeOnHelicopters might mean you did not opened your PC since some time ago :).
Eagle Dynamics, Bohemia Interactive, Laminar Research, eSimGames are currently that type of companies we have to encourage to evolve, hoping maybe that some day they will even work together... who knows. But even if they will work on their best bets we still have to encourage them.
Otherwise you can go to EA, Ubisoft and so on ... these are not creating anymore... they are just reworking and remarketing things (gret marketing BTW).