1. Bob Fosse's early choreography ... but specifically 'Kiss Me Kate'
2. Cyd Charisse/Gene Kelley - Singin' in the Rain "Broadway Melody"
3. Cyd Charisse/Fred Astaire - The Bandwagon "Dancing in the Dark"
4. Frank Sinatra - Pal Joey "The Lady is a Tramp"
5. 'performance' of "Ol Man River" by Caleb Peterson and MGM chorus- 'Till the Clouds Roll By'
there are, obviously so many left unsaid... virginia o'brien, donald o'connor, vera ellen, buddy ebsen, eleanor powell, ann miller, sinatra, crosby, jane russell, jane powell, and on and on the list could go. but i suppose when you must categorize genius, moments spring to mind, and i'm sure it's different for everyone.