I know Tyson-Holyfield wasn't, not at all.

As for the others I really don't know what the P4P lists were at the time but

Leonard had come back from a long layoff when he fought Hagler so no.

Doubt it with Hagler and Hearns.

Leonard-Duran seems possible but again I have never looked at P4P lists from the 60's, 70's, early to mid 80's.

Chavez-Whittaker was 1-2 unless I'm totally mistaken.