Project Cars 2 without any kind of hesitation. that game had it all and while it deserved more polish in several areas (its AI, its default setups and its multiplayer UI notably) it did everything at the very least decently.
it's still extremely funny to me in a bittersweet way that any time one of the current racing sims is said to improve its physics it inevitably drives more similar to PCars 2 than it did before; wonder why that is, almost like SMS was onto something...
