musically speaking, Bob Marley is one of the main if not the most important exponents of reggae and not only that if not that it has been become a symbol for many of Rastafarianism.
Although currently there many very good groups of reggae as Godwana, ganjah area, prophetic culture, Morobe and others are the ones I like.
I'll leave you a video teacher zone ganjah song entitled "The Messiah rencarno" which tells the story of the Rastafarian since 1930