In the 4 rounds, 4 of 7 era, only Forsberg and McDavid have done it.
In other sports, I remember MJ doing it two years in a row, in 1989 and 1990, by 200+ and 100+ points over 2nd place which is just nuts when you consider the MVPs usually score 600 to 700 in an entire run. Only other player to accomplish it was Garnett (in 2013 iirc, my memory is fuzzy), but only by a few points over Lebron. That meant MJ lead the playoffs in points and ppg for 8 of 10 consecutive years. Just bonkers. And some still think Lebron is the GOAT
He's pacing almost 150 in the last 4 playoffs.