Hm, for music, i will forgot about a LOT, but Liz Vocal, Magnum Opus, Sonic Hybrid Orchestra, Diao Ze Yong and Tutti Sound are what comes to mind there.
For art/doujinshis, my first place will always be Zounose, followed by NITRO UKNOWN, Drill Chichikuri/Lunatic Reformatory, ACID CLUB EAST, Tonohifun and DYNAMO.