Conversation so far:
When did Ezio Pinza start performing in operas?
Pinza's Metropolitan Opera debut occurred in November 1926 in Spontini's La vestale.
Was he immediately successful?
CANNOTANSWER.
Has he worked with anyone notable?
in Spontini's La vestale, with famed American soprano Rosa Ponselle in the title role.

Question: What other operas has he been a success in?
Self-contained rewrite: Besides La Vestale, what other operas has Ezio Pinza been a success in?