That was Charles II, the Merry Monarch. James II succeeded his brother Charles II. Charles II could not hang Oliver Cromwell during Cromwell's life. He did the next best thing and hanged the remains from a tripod outside the gates to the City of London. Eventually Cromwell's head disappeared in a storm. Rumor has it that the skull was stripped and covered in molten silver with the top removed to serve as a ceremonial drinking cup for private but formal royal family occasions. Hopefully, the rumor is true.
Nathan Bedford Forrest, OTOH, was an honorable man, a brilliant soldier and military leader, and a distinguished citizen. Memphis is proving that it was not fit to have his remains in its cemetery.