Skunk Baxter (Steely Dan, Doobie Bros) and Mike Campbell (Petty& Heartbreakers), and Phil Manzanera (Roxy Music, solo, David Gilmour) cited above are all great examples of underrated guitarists that I agree with. Dick Dale, nah. Way too prominent and influential to be underrated. Heck, practically invented a whole genre of instrumental guitar rock, with his surf music, up there on all the Rolling Stone lists etc. Now Link Wray, maybe.