SGA finishes the season as the most efficient 20-point scorer in the league with 67.0 TS%. He averaged 31.
Second is Jokic with 66.9% TS. Jalen Duren also missed the cutoff just barely, averaging 19 PPG on 69% TS.
Data is from https://dunksandthrees.com/epm/actual who actually measure the TRUE shooting percentage. Sites like statmuse and ESPN estimate TS% through a coefficient of 0.44 for FTs. However, DunksandThrees counts every time a player goes to the line as one attempt, excluding and-1s and adjusting for fouls on threes.