I saw the disclamier, so I will reput my names.
Rucklo- good and frequent submitter with those songs you can get down with, even if it is not your genre.
NemisisTheory- That music is not even made for newgrounds, it's like something you hear in movies. Very epic music.
MaestroRage- Great at creating those backround music for games as well as music for videos and all sorts. Can make classic with a twist.
Joshhunsaker - Ambient music for him is a specialty, it's just so soothing and inspiring.
Nirodha - I added him because I like "Alive".
Kmax - His ambient music is a strong ambient, because it's adds those drums and unsurpassable beats.
Deathkllr84 - Master of metal on newgrounds.
IndieDance -His/her techno makes you wonder how ever these ideas could have beem thought up. Just phenomenal.
Cycerin - The orchestral sounds added to the music in addition to his techno rock sounds defy the limits of what you think is good.
Waterflame - Just a good all around video game music creator.
Sebby64 - Similar to cycerin's comment.