We know that Alec Guinness didn't think much of the Star Wars films. (I saw him say as much when he was a guest on the Dave Letterman show years ago.) Consequently, he feared that he would be best remembered for his role as Obi-Wan Kenobi. His apprehension was correct, unfortunately. Except for, say, his role as Colonel Nicholson in The Bridge on the River Kwai, Guinness isn't known to many filmgoers these days for playing anything other than playing a Jedi knight.
Do the man a favor. He was a great actor, especially a great comic actor. Buy The Alec Guinness Collection, a 5-disc set from Anchor Bay Entertainment. The collection contains five comedies that Guinness made for Ealing Studios between 1949 and 1955: Kind Hearts and Coronets, The Man in the White Suit, The Lavender Hill Mob, The Captain's Paradise, and The Ladykillers.