Ban (The Seven Deadly Sins) vs Deadpool (Marvel). If you have a UniVS template with a picture of the two to replace the thumbnail, feel free. Comment your opinion on who would win and if you'd like to see this as an episode.
Both of them are hard to killed, having stubborn healing factors that let them tank anything that comes their way. They also are in love with someone who is in their universes afterlife, and they would gladly die to be with them, but can't, the fairy guardian of the forest Elaine for Ban, and the physical manifestation of Death for Deadpool. These two are also the "bad good guys" of their series, usually coming off as insensitive and selfish, but having a heart when the moment really needs it.
Both of these guys are nearly impossible to kill because of their rapid healing, but here's how I think it would eventually end. Ban has the stats advantage right off the bat, being able to stand toe to toe with the dragon sin of wrath, Meliodas. Deadpool has the technology advantage with his array of firepower along with strong melee weapons. Now here's where it's decided, Ban has the ability Snatch, which allows him to steal the physical strength of an opponent, although his body can be damaged if he steals too much.
Now this is where you might say, "but wait! Can't Deadpool just cancel out Ban's healing factor with his carbonadium sword?". Well, the thing is that Ban has a healing factor based on magic, we aren't even sure the sword would work on him. Even if it did work, the second Ban realized that he couldn't heal after being cut by the sword, he'd use Snatch, which can also steal physical objects, to steal it, then Deadpool's best sword becomes his worst weakness. Overall, Ban has a counter for whatever could be a danger when fighting Deadpool, which is why the fox sin of greed will be stealing the win in this fight.