Ronnie Coleman.
There is a backstage pic of Ronnie form 2003 or 2004 next to Jay and Dexter and whoever, and his delt looks the size of everyone else put together! In 2003 his delts even held up to Markus in terms of size, plus they were riddled with striations and detail in a way the synthol crowd can't compete with.
Dorian's were part fo the reaon he did so well, keeping a v-taper no matter how wide his waist was, same with Jay and Ronnie. Kevin and Flex both had great delts, but the oil issue is hard to overlook! Wolf has great delts, which somehow mask his average back and arms in most shots (see back double bi).