Mathcore or math rock or avant garde can still be considered as progressive since its all a sub genres of progressive or they manage to evolve from progressive
some of the bands i like...
Dredg
Cog
Kayo Dot
Sleepytime Gorilla Museum
Porcupine Tree
Deadsoul Tribe
tool
The Mars Volta
65 Days of Static
Rush
A Perfect Circle
Opeth
King Crimson
Genesis
Muse
Oceansize
mew
messhugah
Mastodon
Necrophagist