Jeremy Paxman would be ideal - he takes no crap, asks the questions the public want answers to and doesn't push his own agenda. And he is relentless and thorough when it comes to sniffing out bullshit.
Oprah (as someone else said) is probably tiptoeing around Harry and Meghan so she nabs the divorce interview. I was totally unimpressed with this soft-soap approach of hers - as I learnt very little new from the "bombshell interview" except vague recollections with no context or names, all served with a huge dollop of privileged self-pity. Not forgetting Meghan's "look at me" hand superglued to her pregnant stomach, as ever.
I'd imagine Harry and Meghan had long conversations before an interview was even mooted as an idea - though, if they did extensive preparation and coached one another, their stories didn't always match.
As for Piers, I think it was only a matter of time before he pissed someone off enough to warrant a sacking or a resignation (take your pick). I hate to think of anyone being #cancelled for not parroting the woke narrative, but on the other hand he was deep in on the phone hacking scandal, so I'll shed no tears for him.