If none of that will work for him, stop free-feeding now. I know Tiggy doesn’t like toys, but make him work for food and he will play.
At this point, please remove his bowl as well. Completely replace it with a toy that holds food. Show him food comes from the toy, and if he wants it, he will work for it. If he doesn’t eat, he doesn’t eat.
If he doesn’t eat for a long time (a week, to the least, two for the most.) You can let him have a bowl again, but only give him a quarter of a cup twice a day (Once in the morning, once at night.). He doesn’t have a shut-off switch when it comes to food, so you cannot free-feed Tiggy. If you feel bad about feeding him so little, you can switch to a can of wet food once a day. Preferably diet wet food.
Once as he has lost some weight, you can attempt my previous advice.