I also just realized that you can use 538's RAPTOR to compile a list of the top playoff performers across multiple years. Embiid's 2018-19 performance is the #1 rated playoff performance by their metric since he started making the playoffs in 2017-18. His 2017-18 performance was great at #32 as well. His 2019-20 was pretty garbage though.
Keep in mind that this data is from before he took a huge step forward this year. Two other Sixers performances show up in the top 10, including one surprising one.

Also, over two decades of playoff RAPM from 1998-2019 (I can't find updates for last year), Embiid ranked 6th behind LeBron, Draymond, Manu, David Robinson, and Kawhi.
https://www.reddit.com/r/nba/comments/db5hpt/19982019_playoffs_rapm_1_lebron_james_1_draymond/






















