Wow, thanks for the link to Calvin Vollrath. He's got some nice selections on there. (Had a gig last week which included a catered dinner beforehand, and I primed the pump by playing tunes with lyrics including "you're got to dance with who brung you, swing with who swung you" and "there's a dance here tonight tonight, oh honey won't you come along with me" just in case anyone was thinking this would be a spectator activity.)
Yesterday I liked these people:
https://store.cdbaby.com/cd/housatonicphilharmonic
This one needs speeding up, but it's 4+ minutes.
https://store.cdbaby.com/cd/joeerik
The filter "sounds like" obviates the song title. Likewise specifying "contra dance," although that does pull up nice long cuts.
--Karen D.