Rushton Moreve (born John Russell Morgan; November 6, 1948 – July 1, 1981) was an American bass guitarist best known for his work with the rock band Steppenwolf from 1967–68 and again in 1978. According to singer John Kay, Moreve was an intuitive bassist with a melodic style that brought a non-commercial sound to Steppenwolf, a technique exemplified on the hit he co-wrote with Kay, "Magic Carpet Ride".
Moreve's early influence was essential in creating the unique musical style for which Steppenwolf became famous. Moreve joined the band in 1967 and performed on their debut album, Steppenwolf, which was composed of covers and songs written by Kay. Moreve's influence was heavier on the follow-up, The Second, his final album with Steppenwolf. He split with the band in late 1968 when he refused to fly back to California, fearing it would sink into the Pacific Ocean. Moreve was killed in 1981 in a motorcycle accident.