If we are hopeless at corners maybe the solution is to stop simply crossing balls in directly? Let's be more imaginative than solving a problem with a big guy. Look at Man City for example, they would never use this tactic. Everything is short and designed to move defenders around to make gaps to get in behind. I know they are on a different planet and have grade A players but it's more about imaginative play than personel. When we get a corner we rarely benefit and it looks like we don't do much work on them in training tbh.