The man born Chad Butler, aka J.R. Ewing, Jack Tripper, Mick Jagger, Tony Snow, Sweet (James) Jones and most famously Pimp C, was one-half of the monumental Southern rap duo Underground Kingz (UGK), who, alongside DJ Screw, Swisha House and Three 6 Mafia, revolutionized hip-hop in the ’90s with their instantly recognizable meshing of hip-hop hi-hats and 808s with soul ballads, chopped and screwed down to a smooth, purple-stained tempo. Hailing from Port Arthur, Texas, Butler’s collaboration with Bun B, the other half of UGK, took them to the “toppermost of the poppermost,” to borrow a phrase from The Beatles. The duo eventually rose to the peak of the hip-hop…