I've always loved Jerry Garcia's tone on the Live/Dead album. I don't know what the heck happened to his taste in tone in subsequent years but I can't stand his thin, nasally guitar tone after about 1970 or so.
I like the guitar tone on the song Stop, by Black Rebel Motorcycle Club, from Take Them On, On Your Own. It's one of the few in-your-face mixes I like, and the guitars really roar.
It's hard not to like the 70's vibe Sabbath-style guitars on Don't Run Our Hearts Around by Black Mountain.
And while I'm not much of an AC/DC fan, how can you not like Angus Young's SG-into-a-cranked-Marshall tone?
Oh, and Mike Bloomfield's Tele-into-a-cranked-Twin tone on The Paul Butterfield Blues Band's stuff is sublime also.