Who are some good clical clarinetists?

You should add Stanley Drucker to your list. Four decade career as principal clarinettist for the NY Phil. You may also want to expand your categories to include Sidney Bechet and Artie Shaw, on a purely tonal level these guys are phenomenal. If you are looking at pure tone, you may also want to listen to some Klezmer music, as this is far and away more daring than anything you will hear in an orchestra.