Avengers: Infinity War - Every Character Ranked By How Likely They Are To Die
30. & 29. Korg, Miek & Valkyrie

Quite how much the MVP partnership of Thor: Ragnarok and the newest badass warrior will even be involved in Infinity War remains to be seen, but we know that they're on Thor's ship when Thanos attacks and it's fair to say that they'd be among the first to stand up to an invading force.
While that might make them seem like smart targets for the deadpool, the Russos surely don't want another Ragnarok situation where popular characters (in that case the Warriors Three) are almost casually killed off to get them out of the way. Let's just assume that Valkyrie will lead the surviving Asgardians to their escape from the ship and Korg and Miek will offer protection as they flee to safety.
That way we can get a Korg & Miek spin-off and Valkyrie can come back for a Thor sequel.
28. Pepper Potts

For a long time it looked like Pepper Potts wouldn't even be involved in the MCU after Iron Man 3, but her "surprise" appearance in Spider-Man: Homecoming not only brought her back into the fray but also reignited her relationship with Tony Stark.
If she was to die, it would be to cut Tony deeply and further compound his guilt at not being able to protect those he loves (and everyone else), but the fact that he will spend so much time away from Earth (according to the trailers at least) probably means that Pepper's involvement will be kept to a minimum.