I think The Mahavishnu Orchestra had/has no rivals. The instrumentation alone makes them completely unique. The band had a power, an energy and an impact that can't be duplicated.
However,
there are fusion elements in the band's works that most fusion bands have. If you like the soaring energy and the blazing musical speed you might like some of the later King Crimson music (THRAK, THRaKaTTaK, ProjecKts).
