For this chain-of-thought reasoning and answer, what was the question?
The relevant information to answer the above question is: He is best known for his portrayal of the Scarecrow in MGM's classic The Wizard of Oz (1939).
 A: Raymond Wallace Bolger
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Q: Raymond Wallace Bolger (January 10, 1904 -- January 15, 1987) was an American actor, singer, and dancer (particularly of tap) of vaudeville, stage (particularly musical theatre) and screen, who started in the silent film era. He is best known for his portrayal of the Scarecrow in MGM's classic The Wizard of Oz (1939). He was also the host of his own television show, The Ray Bolger Show.

Based on this passage, who played the scare crow in wizard of oz?
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