You know, it was confusing. I did a LOT of Google searching for posters of his Broadway shows. The one I turned up said that he was King Arthur and you note that he was way down in the list of names in that one.
I am in Texas and not familiar with what all he did on stage. Also, I believe the larger poster I found was on page 36 or somesuch on one of my Google searches or I’d find and post the link.
Lol, I just went with what I could find, and as you noted - it may be incorrect. I’m thinking he may have been in Camelot a number of times in various plays??
Heading for bed, night.
That being said, I am very appreciative of the fact that your link of him singing the song by far made me appreciate him now more than ever. He was one of the great singers on the American musical theater stage - make no bones about it.