Well there's plenty of mods out there with male protags, buuuuuuuut if you wanted to perhaps play Echidna as a big hunky robot dude with dubious morals (which thinking about it sounds even better than the original lol)
I'd suggest grabbing SLADE3, opening the thing up, finding all the player sounds and replacing em with like, SFV Akuma sounds (you can get em on the Sounds Resource) and then replacing the mugshot with one of your choosing (couple custom frames in there, shouldn't be too hard to rename extras of your own)
In Pvt Stone's case I'd suggest the same tactic, but if that all is too much effort for you just deleting the mugshots and player sounds will do the job.