I'm not too sure what justifies "creative", but
Marcus from Vertical Rush- angels for the win!
Allura's Mark John and Caracal's Field both have pretty interesting licks, to me.
SK from Peepshow is pretty original!
Johnathan Leong in The Fire Fight has pretty intricate lines
Ariff from Postbox has some nice jazzy fruity stuff
The boys from Slathe nail the riffs ruthlessly and they stick in the head
I don't really know how to judge creativity. My bad.