What is the best miniature size for large scale battles, but non-puny infantry?

There is only one true scale and it's 28mm.

This picture actually makes me a believer.

Although, converting models at that scale is probably a bitch, and that's half the fun for me.

Thanks.

Yes. It is ye olden scale for wargaming with toy soldiers.

Inquisitor used 54mm, if that fits your definition of a wargame.

It makes me wish I thought of this while I was still playing Car Wars.