Great Organists in Rock

The recent thread about the greatest rock guitarists got me thinking about great rock organists. Here's my list so far...who have I forgotten?

Hammond

Keith Emerson (ELP)
Jon Lord (Deep Purple)
Gregg Allman (All Bros Band)
Lee Michaels
Ken Hensley (Uriah Heep)
Doug Ingle (late Iron Butterfly)
Jerry Corbetta (Sugarloaf)
Al Kooper (BS&T, Blues Project, etc)
Booker T.
T. Lavitz (Dixie Dregs, Jazz is Dead)
Steve Winwood (Spencer Davis Group, Traffic)

Vox Continental

Doug Ingle (early Iron Butterfly)
Ray Manzerek (Doors)