Don't forget Catoire, Roslavets, Lourie, Blumenfeld, Borodin, Tcherepnin, Goltz, STANCHINSKY, Eiges (konstantin, but his son is pretty good too), Myaskovsky, Gretchaninov, Sviridov, the Alexandrovs, Goldenweiser, Mosolov, Rebikov, Lyatoshinsky, Protopopov, Popov, Bortkiewicz (my fav), Sabaneyev, Glazunov and Gliere (of course Scriabin and Rach too).
Close second for me is the French, including Ropartz, Fanelli, Hure, Schmitt, Ravel, Debussy, Jongen, Decaux, Koechlin and Roussel.
Then very close third is the composers from Britain, including Howells, Alwyn, Piggott, Ireland, Arnold, Delius, Quilter, Bax, Lloyd, BRIDGE, Cyril Scott, Vaughan Williams, etc.
I like Scandanavian composers but there are only a few who really stick out to me, being Atterberg, Klaus Egge, Tveitt, Rangstrom, Langgaard. Finland also has a host of good composers such as Ernest Pingoud, Väinö Raitio, Palmgren and Sibelius.
I've never had much of an interest in Austrian/German composers other than like Reubke, Zemlinsky, Marx and Schreker.
Fell in love with Schreker's piano transcription of his Kammersymphonie last week. Magic.