BwayLeadman,
Yes, but don't forget that she was already a Tony-winning star before she even met Fosse.
She had legendarily stopped the show "Can-Can" cold on opening night with the number, "Apache Dance" -- so much so that the audience wouldn't allow the show to continue afterwards. The scene changed and the other actors were in place to continue with the show, but couldn't because the audience was calling for Verdon and wouldn't stop applauding until she appeared. She'd already changed out of her costume backstage, when Cy Feuer, the producer, ran back and grabbed her out of her dressing room and pushed her out on the stage wearing only a bathrobe. Embarassed, she took a bow, the audience went wild and the standing ovation continued for minutes.
Now, THAT'S a showstopper -- LITERALLY -- and Verdon went on to get her first of four Tonys for that performance.
While she and Fosse later formed a famous partnership (and Broadway is the better for the fact that they did), she'd have been a legend whether or not she'd ever met him.
"What a story........ everything but the bloodhounds snappin' at her rear end." -- Birdie
[http://margochanning.broadwayworld.com/]
"The Devil Be Hittin' Me" -- Whitney