LeBron, Curry, and Durant tonight with an average age of ~39 years old: 90/19/27 on 55/41/71 splits
Somehow these guys are still doing it. LeBron played by far the most minutes as well with 39 as the oldest of the three.
Aggregating the stats is kind of an interesting way to look at it, and they all scored nearly right at 30 (30, 29 and 31), but LeBron and KD carried assists and rebounds while Curry and Durant carried 3pt and free throw shooting splits (LeBron shooting 1-6 from 3, 5-9 from the line).
Curry/KD stats: https://www.espn.com/nba/boxscore/_/gameId/401810997
LeBron stats: