Active Games for Basic Fantasy

[teaman]

This might be more what you are looking for:

https://www.twiddla.com

I used this for a few years, actually, before moving over to roll20. It's easy and free.

Another option is:

https://www.rptools.net/toolbox/maptool/

I think players have to download this one, but I've heard from other folks it is not a huge deal.

Seriously, give twiddla a try first.

[orobouros]

I have no interest in entering hit points for PCs or monsters. No desire to automate anything. All I want is a platform on which to share a battle mat or map online.

Roll20 is fairly flexible. Some people use it ONLY for generating character sheets. You can also use it ONLY as a way to display a map; this is nice if you have an LCD gaming table and want to use "fog of war" visibility effects. If you don't want to use the built-in tracking system, you can just avoid tokens all together, or add them without linking them to character sheets.