Who is your favorite FORMER U.S. Vice President who NEVER became President and why? (Polite arguing is OK)

In otherwords, don't pick Vice President Harris because she is the current Veep and could be president some day. Don't pick Veeps like John Adams, Thomas Jefferson, Calvin Coolidge, Lyndon Johnson, etc., because they became president later. Doesn't have to be someone in your lifetime. So, Elbridge Gerry is okay to pick.