My wife and I were fortunate enough to see Ms. Towers in "The King and I" opposite Yul Brynner. Brynner, surprisingly enough, didn't "phone in" his performance and was full of energy for a role he had played many, many times. He really had a presence on the stage but he could not blow away Towers. She matched his enthusiasm and vitality and provided us with a memorable evening.
We deal in lead, friend.