I'd take Taibi over him. I feel the pressure on Taibi was coming into a world class team and being judged to the standard of possibly the greatest keeper of all time, by that measure, every mistake was magnified and the pressure just compounded, but you could see he was a keeper and you didn't look at his technique and think he looked like you would between the sticks.
I genuinely haven't seen a keeper do some of the things Onana does for seemingly no reason at all. He has no comfort or ease in actually being a goalkeeper - for as calm as he is with his legs, he's as panicked and disjointed with his hands.
Just not a keeper a backline can trust. There's an urgent need to get him out of the team, for me. Maguire got slaughtered for unsettling the entire backline when he was playing like an absolute calamity, and Onana is doing the exact same thing now. Further to that, he'll have a massive target on him now and teams we face will be cannoning speculative shots at him non-stop. I wouldn't back him to come out of that smelling of roses.
Not a keeper for me. Wish him luck elsewhere.