Mix of both and Robert Baratheon.
It really bothers me that GRRM called Aegon IV “the Henry VIII of Westeros”; Aegon IV is far more a caricature of Henry VIII than he is like the real deal. We don’t see traces of Henry VIII’s genuine piety and religious feeling in the Unworthy King, Aegon’s promotion of the bastardborn Daemon clashes with Henry’s obsessive search for a legitimate heir, and for his many faults, Henry VIII was far more competent than Aegon IV ever was.
I’m all for Henry VIII being remembered as a wife-killing brutal monster by people, but reducing him to simply that ignores his very long reign as king. Aegon IV is Henry VIII’s worst traits. I’m less inclined to pin Robert Baratheon with Henry VIII because Robert went around creating bastards willynilly and Henry VIII only had one confirmed, like 4 rumored, and was actually rather conservative with his taking of mistresses compared to other monarchs at the time.
Well, the reason why I pin Robert Baratheon has less to do with the bastards, and more to do with Margaery Tyrell and Renly’s plot to make her Robert’s queen.