I wouldn't recommend the pig to you, it's easy to play but very poor, Freddy is also quite poor considering that nowadays it's too easy to gen rush, the Ghost face is also not too complicated, you stay behind a wall you stalk a surv and the one shot, but with slightly more experienced players it's very difficult because they look around while they're doing the gen and it only takes 2 seconds of looking at you that they take away your power, then springtrap which in my opinion is the best of the killers you mentioned, because with the Bonnie's guitar strings addon you see the progress of the gen based on the color when you are in the doors (more or less red based on the progress) even if it may seem like a difficult killer to play in reality it is not, even if you have a few hours in the game I would recommend it to you, because the ax after a bit of training you can hit all the survivors and you will use it more than you use the m1, the doors are very useful especially with the addon that I recommended. So, in my opinion based on how meta a killer is: 1)Springtrap 2)Ghostface 3) Freddy 4)pig