I absolutely adored Hidari's work for SoV, so my number 1 return pick is Hidari. Did a google search on Wada (since I dont have anything from her in Heroes and haven't played any of the games she's worked on very thoroughly) and that would be another absolute pick. Senri Kita is good too. For Heroes artists, I'd love for Haimura Kiyotaka, their artwork for Deirdre actually made me get interested in FE4, aha. FE has had a lot of good artists that it makes it kind of hard to not sound like a parrot when naming off who to draw for a game.