You know, I totally thought you were talking about Spike from BtVS and I was beside myself trying to determine how he’s anything like Gambit
Apparently there’s a Spike in Cowboy Bebop which I blanked on. Never seen the show, I really am not a huge sci-fi fan (just managed to finally get around to watching StarWars about 5 years ago). C’est la vive.
As for TV characters who remind me of Gambit & Rogue, not on characters by situation - I’d saying Pushing Daisies. Two people in love that cannot, under threat of death, touch.