This one is the best, no contest:
The rest are more or less trash, but 2 on PC holds a special place cos it was one of my first games in 1998, but I wouldn't be able to play it today.
Hot Pursuit 2 is my favorite too (though I played it on PC), followed by NFS III. I didn't like that much when they went open world.
NFS 2 was also one of my first games, its soundtrack is so good that I still listen to it, one of my favorite songs: