I wouldn't touch any of them
They are known mass-produced cookie cutter fake styles, so to trained eyes, they are obvious.
The first thing to notice is the Mantle in blue and the DiMaggio are slowly penned. Not smooth and flowing like a natural signature. Instead they look "heavy" and methodical. Subtle signs of shakiness and hesitation.
The Mantle in black is badly distorted and looks oddly warped. Slant and pressure are way off.
if you look at PSA or JSA certed Mantle's and Dimaggio's, and study them, at some point, the forgeries will become evident. it does not require a technical detail of mistakes, you will just get used to the flow and shape of the authentic versions. Most of the legitimate TPA's get these two correctly. That would include SGC and Beckett.
Learning autographs takes time.
It does not happen overnight.
99% of Mantle forgeries can be opined in one second when your "eye" finally puts together everything.
Those are the only two responses you needed.
Please be patient. You're getting free opining of the items you post.