Here is just a partial list of character voices, impressions, and dialects that I've performed someplace somewhere. The list is always growing...
Harry Caray, Don Pardo, Paul Lynd, Bullwinkle Moose, Cliff Claven, Walter Brennan, Robin Leach, Walter Winchell, Clint Eastwood, Bela Lugosi, Kwicky Koala, Jack Nicholson, Rod Serling, Ed Wynn, Dudley Doright, Julia Child, Sean Connery,Jimmy Stewart, Carl Sagan, Jim Nabors, Old Philosopher, Garry Marshall, James Cagney, Woody Allen, Mr. Peabody, Victor Buono, Burt Lancaster, Howard Cosell, Kermit the Frog, Miss Piggy, Don Adams, Henry Kissinger, Henry Fonda, Truman Capote, Alec Guiness, Pirate, Parrot, Mr. Haney, Peter Lorre, Hubert Humphrey, Ted Kennedy, Richard Nixon, Walter Cronkite,
Art Buckwald, Paul Harvey, Casey Kasem, Gerald Ford, Sylvester Stallone, Phil Donahue, Tom Brokaw, David Brinkley, Ross Perot, Spongebob, Dr. Phil, Bill Gates, Pat Robertson, Humphrey Bogart, Lloyd Nolan, Ray Milland, Robert Stack, William Conrad, News Anchor, British Explorer, Film Director, Newspaper Hawker, Broadway Producer, Captain Bligh, Cary Grant, Christopher Lloyd, Clark Gable, Neurotic Patient, George Burns, Groucho Marx, Henry Higgins, John Wayne, Marlon Brando, Radio Dispatcher, Ricky Ricardo, Ronald Reagan, Tarzan, Cheetah, Boris Karloff, Old Farmer, Old Senator, Cheech & Chong Cold Sufferer, Billy Ray, Computer Voice,
Dialects
Standard British, Australian, Texas, Scottish, Irish, Cockney, Valley-esque, Russia, India, France, Long Island, Wisconsin, Midwest Farm/Ranch, Kennedy-esque.