I was first introduced to Phish in 2010. At first I hated every minute of it. I grew up listening to metal and rock, you know typical radio stuff (Sevendust, Godsmack, Chevelle, ect.) and some oddball stuff (Gwar, etc.). I grew on me and the genius of Jon Fishman shines through his playing. His ability to play the hi hat is insane. The guy is nearly a genius and his antics on stage just inflate his persona so that much more.
To hear Fishman at his best:
-> 2011 -> Hollywood Bowl (8-8-11)
Claude Coleman from Ween is another drummer who most have never heard of.