Minor 7 chords. If they’re good enough for Carlos Santana, they’re good enough for me and good enough for you too. Learn them here.
Many play their Dominant 7 chords as a barre chord, and it sounds too muddy. Learn a couple of nice clear fingerings here.
Begin amassing your vocabulary of chords for jazz with the Major 7. Learn to play it and to go to the right fret when you see the chord symbol for it.