There are lot of them, even in communist regime there were made good films. I would probably suggest something from the pen of Zdeněk Svěrák.

Kolja- this one got Oscar

Nejistá sezóna - tragicomedy about theater players.

Loads of comedies like Trhák, Jáchyme hoď ho do stroje, Kulový blesk…

These are classics https://m.imdb.com/name/nm0006664/?ref_=fn_al_nm_1