Bearing pullers: what's your favorite tool or method?

Since I have suddenly been faced with this issue several times recently, after living a whole life where it *never* came up, I am considering going against my principle of not acquiring single-purpose tools.

Mostly these have been regular-sized AC motors like you would find in various small(ish) household appliances, but certainly not all identical. And some car parts, like an alternator or starter.

First preference is a DIY solution that does not involve welding or intense metal work. Off the shelf re-purposed parts is how I like to roll.

But, willing to capitulate and buy a special tool *if* it is versatile enough that I never have to think about this again. Inner and outer a plus.

Any suggestions?