Step 1 : Introduction to the question "For what role is voice actor Jim Cummings best known?"
...James Jonah Cummings is an American voice actor and singer, who has appeared in almost 400 roles. He is known for voicing the title character from Darkwing Duck, Dr. Robotnik from Sonic the Hedgehog, ...
Step 2 : Answer to the question "For what role is voice actor Jim Cummings best known?"
Winnie the Pooh:
James Jonah "Jim" Cummings grew up in Youngstown, Ohio. He was born there Nov. 3, 1952. He would later move to New Orleans, where he designed Mardi Gras floats and worked as a singer, a riverboat deckhand and a door-to-door salesman. It was after moving to Anaheim, California that he began his career as a voice-over actor. He frequently plies his trade as the voice of Disney characters. In addition to his most famous role as Winnie the Pooh, he also voices Darkwing Duck, appeared in the Lion King and voiced Kaa in "The Jungle Book 2" in 2003. Source: IMDb.com