When it sounds good, don’t change it it’s a waste of time and money. Adjust the height, balance, try different values for the tone cap, and different strings, and find the right settings on guitar and amp. Try it with different amps too (and pedals). Change the pickup only if, after all that, there is still something wrong to your ears, or if you are looking for something completely different (like a humbucker). Still want a recommendation: Keystones from Wildepickups (Bill Lawrence). Low (vintage) output with great clarity (not shrill), balance and overall versatility, low noise too. Nobody can explain why those magical properties, they are just well made plain single coils. Though they’ll depart from your 100% vintage correct look, I can’t find anything that sounds better, except if you are looking for, once again, a humbucker or so.