>>128148524
Learn 7th chords with different voicings, different inversions, all up and down the neck
Learn to play the melody of a song in the top note with the harmony below it. Pretty sure thats called "voice leading"
Listen to george benson and wes montgomery and pat metheny, how they can play comp/rhythm while also playing melodically and not just strumming a chord.
Joe Pass has an instructional tape you can find on youtube. That's the best jazz guitar lesson I've ever seen.
Also check out fingerstyle country blues like Doc Watson just to see what the guitar is capable of. Playing harmony and melody and rhythm all at once. Or Elizabeth Cotten. Simple stuff that helps you break out of wonderwall syndrome.
Biggest thing would be playing a simple song like Blue Bossa or Autumn Leaves, without any accompaniment or backing track, playing the melody and the chords at the same time.
Go around the neck and experiment-
>What if I was playing an A minor 7th chord with an A in the melody? C in the melody? E or G in the melody?
Move around the neck and memorize those shapes, learn how to "imply" a chord without playing all 4 notes of it. Like playing G, B, and F# "implies" an E minor 9th chord with an F# in the melody, even though it doesn't have an E note. Basically learn how to play the melody to a song while sticking chord notes on the adjacent, lower strings.
Hope that made sense.