Well since I need to sleep I'll just link some producer's lists of work.
First Mayu song I linked: http://www.nicovideo.jp/mylist/19099704 - MikitoP. Honestly not sure whether you'll like his other songs. Give Setagaya Night Safari a listen though. (世田谷ナイトサファリ)
Second Mayu song: http://www.nicovideo.jp/mylist/3304983 - 164. The quality of his work varies a lot IMO. I like Inori, NO STARS, and 天ノ弱.
Gumi song: http://www.nicovideo.jp/mylist/12177097 - DevilishP. Basically all his stuff is great. There are some Miku songs in there that are tuned pretty high.
http://www.nicovideo.jp/mylist/6330215 - Yuyoyuppe. Vocarock, similar to DevilishP but with a different style. Recommend: Story of Hope, Palette, Leia, Reon, and Hope. Has a lot of other good songs too though.
http://www.nicovideo.jp/mylist/14483709 - MuryokuP. Vocarock with some electronic backing/full on dubstep style tracks. Some great songs, a lot of OK ones. Recommend: Aspirin, Graviton and his Sweet Sweet Cendrillon Drug remix.
Couple of producers there who have some very early works that you probably want to stay away from. Stuff they made before becoming somewhat popular etc. Try to stick with original songs (オリジナル in the title), probably avoid remixes and covers. Yuyoyuppe has some vocal covers he's done himself of his own songs.
Hopefully I haven't completely underestimated/overestimated your ability to read moon runes here
. Apologies if I've done either though.
Wow, this is more than enough for now. Thanks. I'll be sure to ask for more after I finished processed all of this.
Holy ****, I've been trying to ignore it, but since scamp is tweeting, while not a lot, about space bros being ******* awesome the past few episodes. And considering I take his opinion very seriously.... after the 23rd, if I pass my final exam, I'll be sure to start marathoning it.