"It's his story because he created it."
I think if someone thinks JCM is the best Hedwig because he's the best actor to convey the acting/singing and persona of JCM that's fine. If because he wrote the character he has the "internalized" conception of the character down pat as the writer envisioned, (again himself) fair enough.
However the reality is that many of the great performances of theather were NOT written by the actors who gave them life and magic on stage. The actors pulled something out of themselves, like all great actors do.
When I saw Patti breathe life into Evita it didn't matter she didn't "create" Evita on the written page.
Sure JCM has autobiographical elements in Hedwig, (many writers, such as Tennesee Williams do, even if they are not perfomers) and understands his concept of the character, but every actor has to dig in and give their concept of a written character. I remember Tennesse Williams saying that Vivien Leigh both in the West End production of "A Streetcar named Desire" and the movie surprised him, and brought things to Blanche, that he as the writer, had not with her acting.
So fine that some think that JCM is the best Hedwig, but I just think that because he wrote the character nobody can give as great if different Hedwig is just silly.
Caveat here, I really really liked Michael Cerveris interpretation of Hedwig.
"when I’m on stage I see the abyss and have to overcome it by telling myself it’s only a play." - Helen Mirren