So that's what makes Roger the greatest? Why arent all the members of his crew also the greatest because they did exactly that the same as Roger did?
Roger no epic battle - Whitebeard the most epic battle OP has produced.
Roger died kneeling in chains - Whitebeard died standing.
Roger tells about OP like it's his treasure(a lie) - Whitebeard tells that OP does exist.
Roger picks on some Marines, chased by Garp and Sengoku - Whitebeard walking into Marineford.
Pirate King(not strength related) - the actual World's Strongest Man.