Honestly, reggae was kinda all over the place as far as guitar sounds. While he was running p-90s for a big chunk of the middle of his career, Marley used a strat in '73 and humbuckers in '79. Tosh also used singles, humbuckers, and p-90s as well while playing with Marley. I'd just look for anything that's low output and sounds reasonably bright . . . my suspicion is that anything that meets this definition will probably work OK.