I've forgotten that commentator's name but he's very well-known. (whose) That commentator, _{………………………………………………………………………….}, is very well – known

I've forgotten that commentator's name but he's very well-known. (whose)

That commentator, _{………………………………………………………………………….}, is very well – known

I've forgotten that commentator's name but he's very well-known. (whose) That commentator, …………………………………………………………………………., is very well – known