Wonder Man
If Galactus feared Ultron win and stopped that from occuring then Phobos can instill enough fear in Galactus for the win.
https://tse4.mm.bing.net/th?id=OIP.W_u8kkpxq432CS0sasAabAHaNd&pid=15.1&P=0&w=300&h=300
vs.
https://tse2.mm.bing.net/th?id=OIP.XyMze5RDG7IUn5zkI8UAhwHaGK&pid=15.1&P=0&w=202&h=169
https://tse4.mm.bing.net/th?id=OIP.W_u8kkpxq432CS0sasAabAHaNd&pid=15.1&P=0&w=300&h=300
vs.
https://tse2.mm.bing.net/th?id=OIP.XyMze5RDG7IUn5zkI8UAhwHaGK&pid=15.1&P=0&w=202&h=169