I'm a fan of the three pic banners (that's my personal wheelhouse lol).
Rob Van Dam: I like this one. Nice blending, cool effect. Text would work if it was less dominant and a different color. Increase the lighting and make it a bit more green, and this would be great. 7/10.
The Miz: The blending is good, and I like the text. Unfortunately, the black and white and lack of effect created a sorta' bland result. 6.3/10
Desmond Wolfe: The color is a bit too strong, but it still works. Again, I like the text. Unfortunately, the render cuts off the left pics. 6.6/10.
Ezekial Jackson: Imo, the second best of the bunch. The render sticks out, and the blending is good. I'd suggest upping the lighting on the background pictures. Text work, but it's too big. 6.8/10.
Batista: Okay blending, cool effect, cool font. Not a fan of the picture with the back turned, but that's just a personal thing. 6.5/10.
I think these are all good start, and with some work, you'll definitely be good. Keep at it!