Your guitar has HSS config right? Why did you say that after trying your friend's 59/JB set, you don't want a 59? I mean a real hum don't sound the same as a singlecoil sized hum.. and materials of body of the guitar affects the tone too you know, the ESP/LTD might have alder which don't have as much mid and bass as mahogany

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I too don't have much experience with single coil pickups but usually creamy and single coil pups are rarely used in the same sentence.. But, before you pull the trigger and buy new pickup(s), have you tried to roll down the tone knob of the guitar? also single coil pickup (from my limited amount of experience) is very, very did I say very? UNFORGIVING

you might try picking the strings much softer than while using humbuckers *you can also tweak your amp till you get the tone you want, but I personally don't do this because it makes the tone of the pickups not organic.. I mean I tweak my amp to compliment my pickups not to change their sound.. But.. YMMV*.If after all that you still can't get the tone you want, A pickup change is the solution.. I think the Screamin demon might suit you from SD description
"Like its big brother the Screamin' Demon™ humbucker, this li'l savage combines a big, open sound with just a subtle hint of "glass." George asked for a pickup that could scream and provide rich harmonics, but would clean up when he backed it off. Using a unique slotted and Allen head screw combination that gives each coil a slightly different magnetic field, the tone is big and percussive without being too harsh"
OR you might like Yngwie pickups.. Remember to check out as many sound clips you can find on youtube before buying or you might end up buying another (or another) just like what I did a lot of the time.. And yea that's from my not so long experience of playing the fiddle. There are lots of experts round here, just wait a day or two and you can get many info