I agree @loomisjohnson, I don’t directly hear Ray Charles in Richard Manuel’s voice. That’s a good thing! He internalized it, deep down inside, and it came out as his own voice. As did Van Morrison. By the way, Van and Richard trade lines in The Band’s "4% Pantomime" on their Cahoots album. Two great singers, a great band, and a good song. Who could ask for anything more! The depth of feeling and mutual admiration and love when Van sings "Oh Richard" and Richard sings "Belfast cowboy" brings me to tears.
I have to admit my opinion of Rod (and many "like" him) being influenced by my utter contempt for "Rock Star posturing". That’s was one reason I loved The Ramones showing up. Speaking of fashion: Did anyone else find it funny when all 4 Beatles suddenly had mustaches at the same time? What a coincidence. 😉