Mickey Rooney (who’d go on to voice Santa Claus four years later in “The Year Without a Santa Claus”) brought Kris Kringle and Santa to life in the 1970 classic Santa Claus Is Comin to Town (Amazon dvd link).
Narrated by Fred Astaire, Santa Claus is Coming to Town is one of the most perfect Christmas movies ever made.
Pretty much channeled the Winter Warlock, there, and I love it!