I'd say it's almost equal importance in terms of stage time between Pippin and the Lead Player. But, the Lead Player has better material. Ethan Mordden wrote that, for the character of Pippin to hold your interest, you would have to cast a male Gwen Verdon in the part.
Speaking of Gwen Verdon, I was hoping that, when they put together the show "Fosse", they would have included "Time To Start Livin'" and that Gwen would have played Berthe. It would have been nice to have her on Broadway again. She would have won her fifth or sixth Tony Award and, when she left, they could have brought Gretchen Wyler back to Broadway to replace her.
Elaine would be marvelous as Berthe, but I would ADORE to see Kaye Ballard play it.
"A coherent existance after so many years of muddle" - Desiree' Armfelt, A Little Night Music
"Life keeps happening everyday, Say Yes" - 70, Girls, 70
"Life is what you do while you're waiting to die" - Zorba