What if everything had happened exactly the same way it did in Vincent's life until the TV fell from the wires, except instead of landing on his head, it landed just next to him and pushed him into the water, where he was shocked like everyone else in that crowd was? AKA What do you think Vox might have looked like if everything was the same except he was a regular shark-sinner demon?
Funny thing, im actually in the process of designing a sinner OC based on a member of his cult. (His name is Quincy, say hi.)
I'm basing him heavily on those fish that have translucent skin so you can see their bones, which is meant to mirror the trope of seeing a characters skeleton as they are being electrocuted.
Though Quincy is based on a tiny little aquarium fish called a Neon Rasbora. I imagine if Vincent's death wasn't directly caused by the TV, he'd take on a similar appearance, perhaps with more shark-like features. Perhaps he'd be based more on something like the Ghost Shark.