Revolution-spaghettis are among the best and most interesting sw's ever made!!
I love The Mercenary and Quien Sabe? , and also Viva la muerte..tua!, a somewhat humorous but also very good revolution-sw!!
Haven't seen What am I doing in the middle of a revolution, but I've heard it's not one of Corbucci's better films I'm afraid.
Tepepa is also good and very serious I think, but I have yet to see the restored dvd release, have only seen the old vhs release.
Also the forerunner to political sw's, euro western Viva Maria, starring french beauty Brigitte Bardot is an interesting film!!