Old-timey things I find funny:
a lot of the so-called screwball comedies (Bringing Up Baby, It Happened One Night, etc.)
the plays of George Bernard Shaw and some of the movie versions thereof (Pygmalion and Major Barbara spring to mind)
the plays of Oscar Wilde, especially, of course, The Importance of Being Earnest (and the original movie version of it)
Boulting Brothers and Ealing Brothers comedies (not all of them, but a lot of them)
W. C. Fields in small doses
I know there's more, but my brain has gone blank.