For many years Bud Abbott served brilliantly as Lou Costello's deadpan straight man.
2010, Caroline Graham, A Ghost in the Machine, Hachette UK →ISBN
Recently he had successfully concluded a case featuring a poet who wore only latex, lived on liquorice allsorts and worshipped a horse she believed to be the reincarnation of Radclyffe Hall. And she was the straight man.
1982, The Ladies' Home Journal
She was the straight man, he was the comedian, and their audience was "standing room ...