I think a Bob Carver design deserves to be on the list too. His Lightstar and Silver Seven amps come to mind but, in terms of impact, my choice would be the M1.0t.... which is the amp that won Stereophile Magazine's "Carver Challenge"-- going toe-to-toe with a Conrad Johnson Premier Five tube amp.
For some reason I'm unable to attach a link here to the Sterophile Magazine article but it's easy to find on a Google search if anyone is interested.