There is good advice here. This is my 2 cents. I will not go into detail about things that already mentioned, I’ll just reiterate it. Magnet swaps will help. A3, A4 & A5 magnets should help with what you want, but maybe not as much as you desire. If this is the case, there are certain winders who at least have offerings that will probably help more than a magnet swap with your current pickups. One more inexpensive (magnets are also cheap compared to new pickups) to try before switching pickups. Find tighter tolerance 500k pots. Even the pots in Reissue LP’s May have pots with considerably slacker tolerances. When I think of great recorded humbucker tones, especially from the ‘60s & ‘70s, I hear less compression and more open tones. More in common with single coils than many humbuckers. Most agree a good comparison is the Allman Brothers at Filmore East. Gary Moore and many others also come to my mind. Humbucker size P90’s are another choice as was stated. I did this with an LP Standard I once owned and the tone was very good. Those pickups were Gibson. SD Antiquities came in my PRS McCarty 594 Singlecut Soapbar. They sound very good, but weren’t hugely different from many humbuckers in the respect they weren’t as edgy or bright as how I hear in many great recordings. Think Santana’s first 2 albums or Leslie West. I changed pots and caps and the tone opened up some, but not dramatically. I then installed a set of Tyson Tone P90’s and that did it. I also replaced the pickups in my PRS McCarty 594 Singlecut with Throbak SLE-101 MXV humbuckers. This had the same sort of tonal affect as the Tyson Tone P90’s did on the other guitar. I also own a Fender Telecaster Professional. I didn’t feel the need to change anything. Tele’s can have somewhat similar tones as humbucker guitars to my ear. There are less mids and they sound more percussive to me. Another note about single coil Tele’s. The bridge pickup is angled to shorten the location relevant to the low E string and the angle progressively lengthens each pole location until it is at its longest at the high E string. This has to be partially to brighten the low strings and beef up the high strings.