The Manchester United skipper - who counts the likes of midfielders Paul Pogba and Bruno Fernandes, and England duo Harry Kane and Raheem Sterling amongst his current teammates for club and country - believes the Red Devils striker is a step above the rest.
He told United's official podcast: "On the pitch, he's amazed me. He's the most talented player I've ever played with.
"I think as a club, you should have a captain and rely on him, but you need to spread the onus of the leadership in the group.
"He's always wanting to make himself available. I think you can see around the place, on and off the field as well, he's excellent with his charity work, which is great to see.
"I've always spoken so highly of Marcus when I have been with him in the England squad. I can't speak highly enough of him.
"I don't want to put too much pressure on him but I think he's going to be a wonderful player for Manchester United, as he is now."
He's not alone in his assessment either, as full back Matteo Darmian - who left United for Parma last summer - recently suggested Rashford has the potential to be as good as France and PSG superstar Kylian Mbappe.
He said: "For me he can reach the level of Kylian Mbappe and compete for the Ballon d'Or for years to come."