Mercy’s one looks cool. Not a big fan of the rest… Maybe D.va as well.
Genji’s scary face doesn’t go too well with pure white, same for Reaper.
Rein just looks like a radioactive chess pawn (like Reaper & Genji, skin looks scary but the pure white doesn’t go well with that)
And Zen just looks like a pale octopus. One hand looks like a cult leader+god but on the other hand looks like a pale calamari.
I would say overall, not a big fan of scary + white. all the point of scary is shadows and darkness. So pure light white just contrast the point.