NFL Historical Box Scores And Game Logs

Hi.

I’m looking for any datasets related to historical box scores, game logs, or season totals for players in the NFL. I was previously using SportsData.io, but I found major inaccuracies with their season-long statistics for players (including some players having impossible records like 0.3 sacks).

I understand a lot of good datasets in this field are locked behind commercial grade API access, but I am curious if anyone here knows of any directions I can explore. Thanks!