In reply to Frank Pereiro.

That would be a list of all block themes!

You can take any block theme, edit the templates, and remove most of the blocks to get just the parts you want without the cruft.

E.g. if you don't like the sidebar, find the column block and delete the sidebar column. Or if the footer is too busy, open the footer template and remove everything until it's just what you wanted. You could simplify the skateboard theme by removing the post featured image block, taking the site description and socials blocks out of the header. You could also replace Skateboards homepage blocks with just a plain list of posts like the old Kubrick theme ( query block, then inside that post title block, post excerpt, and post read more blocks )

Unlike normal themes, if you don't like something in a block theme you can just edit it out with the site editor using a mouse click. Likewise all block themes can have sidebars if you add one using columns.