Bob Marley I think He was and still being one of the most famous artist in the world, he was a wise man if you listen to him you will find a positive and conscious message with a cool sound also we can practice singing his lyrics on youtube. My favorite song is "No more trouble". ..."Make love and not war! 'cause we don't need no trouble. What we need is love. To guide and protect us on. If you hope good down from above, Help the weak if you are strong now"...