John Mayer across 3 famous tones — mostly through Dumble Overdrive Special, Two-Rock / Dumble-style, acoustic / clean, with single-coils. Here is where to start, then adapt any of it to the guitar and amp you actually own.
Starting point (averaged): gain 2.5 · bass 5.5 · mid 6 · treble 6.5 · presence 5 (out of 10)