Tom Holmes no doubt in my mind.
When Billy Gibbons and Greg Martin both swear by them, then that's good enough for me. Both of their best tones are CLASSIC PAF tones. I was in the front row at a Kentucky Headhunters concert, and heard Greg playing his 58 Reissue with Tom Holmes through a nice early 70's 50 watt Marshall with a Basketweave 4x12 cab. Just absolutely PHENOMENAL tone.
The only problem with Holmes, is the price. Last time I emailed it was $560 for a pair of his PAF clones.
So that being said I use my SECOND favorite PAF clone, the Seymour Duncan Antiquities. These have many of the same qualities as the Holmes, but the Holmes are just a little "fuller" sounding. They have that extra 5% in my opinion.
I've heard the Wagners, and have not been impressed, but many really like them. I also think the Fralin is way overrated, and not really close to PAF tone.
But hey, everyone's version of perfect PAF tone is a little different. Good luck hunting.