Quand Fera-T-Il Jour, Camarade is fucking great.
For other upbeat Seeger songs there is "If I had a hammer"
Joe Hill has a lot of bops along with his somber songs: Mr. Block , The Tramp , It's a long way to the soup line , There is power in a union
Billy Bragg: Never cross a picket line, There is power in a union (no connection to the Hill song, instead it has the tune of Rally round the flag) ,
Chumbawamba has a lot of good stuff like you alluded to, I like their Diggers stuff: world turned upside down and Diggers Song Other stuff would be Give the anarchist a cigarette, Land of do what you're told, Enough is enough
There is a fuckload of other ones but that's what I got off the top of my head and from specific places