Yes, Thomas and Silver are among the characters who never meet in canon who I'd be most fascinated to see interacting and talking just for the sake of it -- it'd be so interesting.

Max and Flint would be another two (okay, they are technically in one scene together in canon, but don't interact as such). Ditto Miranda and Silver. Or Anne and Flint. And I loved the bit of Madi and Eleanor interaction we got, but could happily watch five times as much.