Who are you interested to see on broadway. They may or may not have appeared on stage but you have never seen them in person perform.
My list would include:
Alice Ripley (I saw her in N2N but didnt really know who she was at that time) Cheyenne Jackson Lea Michele Jonathan Groff John Gallagher Jr Julia Roberts Jennifer Aniston Meryl Streep Ryan Reynolds Chita Rivera
Andrew Rannells Ethan Slater (Seeing him in Assassins hopefully though, but needs to be back on Broadway) Jonathan Groff Toni Collette Tituss Burgess Ben Levi Ross (was just listening to his "Waving Through a Window", wish I was watching him N2N rn) Renée Elise Goldsberry Gaten Matarazzo
Sarah Paulson. She can do no wrong, I love her acting. Helen Mirren Mandy Patinkin (saw him when he toured with Patti LuPone, want to see him in a Broadway show) Bernadette Peters Helena Bonham Carter. I would kill to see her do a play on Broadway.