Re: Which pickups have been used by the most diverse range of recording artists?
Short version --> I would say the PAF, JB, PAF pro, Fender single, and hot rod deluxe/texas style type singles. The DiMarzio HS series was pretty popular for recording too, as they were clean, low output, and stacked for no hum.
Long version --> I don't think a lot of guys are using EMG anymore, kinda like Crate amps. I'm not saying they're bad pickups, or amps, but I hear mostly metal guys talking about them anymore. Personally, I think they sounded decent, but most guitarists shy away from batteries in their axes.
I know that a lot of pickups were hot-rodded, especially for the stage. That's where the JB comes in, along with many others. And it was one of the first hot-rodded pickups anyone could easily buy. I think Fender single-coils were no different, however, and I've heard that a lot of guys will record, or would record, with a strat. The reason being that the recording is usually done with software or some kind of preamp, where a cleaner pickup will work best, and not muddy the waters. The strat is also lighter, was cheaper back in the day and not extremely collectible, so a lot of studios had them on hand. Kinda like $500 LP Studios...
Funny, I've seen a lot of guys using humbuckers on stage with something highly-prized and shiny, and then hear how they recorded the album with a single-coil. Personally, I mostly play with a humbucker, but that's because I go from my od808 straight to my amp and play heavier rhythm...
One other thing to point out is that, even though the strat came out in 54-55, it was kinda considered a working man's guitar. It wasn't until the 60's that guitarists were flocking to them. Before that, a lot of guitars were bigger and hollow, like Guild, Rickenbacker, Danelectro, Harmony and Silvertone...basically country gentlemans and some with bigsby-styled vibratos. Until the Gibson PAF, they used single-coil pickups...
Late 70's really pushed the humbucker, the 80's popularized it, and the 90's started to perfect and/or try new things with it, so I think it depends on the time frame, where you're playing, if you're recording, and if you're using modeling software/pedals - otherwise it really doesn't matter.
I think amps/preamps matter(ed) more.