Playing the root plus the two definitive tones (3,b7) as an arpeggio in the left hand provides a nice accompaniment pattern for many styles of jazz…

For a full, but simple and open sound, trying voicing the Major 7 Chord as a 1 and 5 (a perfect 5th) in the left hand and the definitive tones 3 and 7 (that also form a perfect fifth) in the right…