Other notable figures in character animation include the Schlesinger/Warner Bros. directors (Tex Avery, Chuck Jones, Bob Clampett, Bill Melendez, Frank Tashlin, Robert McKimson, and Friz Freleng), cartoon animators Max Fleischer and Walter Lantz, pioneering animators Hanna-Barbera, former Disney animator Don Bluth, independent animator Richard Williams, John Lasseter at Pixar, and latter-day Disney animators Andreas Deja and Glen Keane. Character animation is not limited to Hollywood studios, however. Some of the finest examples of character animation can be found in the work of Nick Park of Aardman Animations and Russian independent animator Yuri Norstein.