comparatives and superlatives

English as a Second Language English Vocabulary, Grammar and Idioms
1

Are these correct with comparatives and superlatives?

He was the more famous of the two celebrities.
He was the most famous of the three celebrities.

He was the more clever of the two.
He was the most clever of the three.
He was the most clever of the group.

Thank you.

2

To me,
He was the more famous of the two celebrities. (Acceptable)
He was the most famous of the three celebrities. (Acceptable)
He was the more clever of the two. (Acceptable; the cleverer of the two is also possible)
He was the most clever of the three. (Acceptable; the cleverest is also possible)
He was the most clever of (in) the group. (the cleverest is also possible)