Candidates don’t choose examiners. For all the good ideas you might have about this person or that person to examine your thesis and you in the viva, you don’t choose them outright.
Your supervisors choose your examiners. They might ask you for your ideas and they might respond positively to your suggestions but they don’t have to. They are responsible for nominating the academics who will examine you.
Your university has to approve the nominations. They have to check the details of who your supervisor selects to check they are suitable. There are criteria that examiners have to satisfy.
And after all of this two people have to say yes.
They can say no if they’re busy. They can say no if, for whatever reason, they feel it doesn’t seem like a good fit for them to be your examiner. They don’t say yes to tick a box. They don’t say yes because they know your supervisor.
When your examiners are confirmed then you can prepare. You can make a choice at that stage to be ready to talk to them at your viva.
That’s the choice you make.