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…
Use your ears and knowledge of scales and chord structure to “transpose” this voicing to all spellings in three musically-useful patterns:
- Chromatically Ascending: C > Db > D > Eb > E > F > Gb > G > Ab > A > Bb > B > C.
- Chromatically Descending: C > B > Bb > A > Ab > G > Gb > F > E > Eb > D > Db > C.
- Cycle of Dominants: C > F > Bb > Eb > Ab > Db > Gb > B > E > A > D > G > C.
Doing so helps to develop an enormous chord vocabulary, one that you will know intimately in many ways: by brain, by eye, by ear, by finger, by body, and by heart… and builds a solid foundation for fluent improvisation.