Track + car + race length AI combos that work well

We have gigantic threads on AI issues to be fixed. Instead of the tiresome task of individual trial and error to find offline combos without quirks, we could use a collaborative thread to share those that we stumbled upon.
I propose we don`t discuss anything, as to avoid useless pollution. Just post the track + car combo you found with no or very little issues, producing overall immersive races. The other users who try the combo can use the agree/disagree feature, so we have some sort of feedback.
If you are using custom AI files, please share them in your post.