There is a reason why most all templates appear to be mere color changes. I'll try to explain.

Dolphin has 2 features that a template like the ones you provided examples for would break.

One is the menu builders. The other is the page builders.

Most of the example templates you pointed out seem to have a different color header for each of the blocks. Now dolphin can do this, but switching block types cannot be done in just the template alone. The template will include the new block styles see more and types but the each block within dolphin would need to be told which block style to use. That is the part that cannot be controlled within the template itself.

Even the page block editor does not have the feature built in to tell each block what design box it it to use. That has to be changed manually in the database.

The same problem will most likely occur when you have a custom menu done which in many cases would render the menu builder in dolphin useless.

So any template of a completely unique design would require a complex set of install instructions for database changes and would lock the site into that one template. You would no longer be able to use the template switcher either.

So in a nutshell, templates of that type, although can be done, would render some of dolphins features unusable.

I would not design a template like that for sale. It will drastically cause a flood of support questions and even if the price was 100-200 each, the amount of support each customer would require would make it not worth it to me.

If dolphin had a better templating system, perhaps this would become a reality.

Right now, your best bet is to hire someone to do a template to meet your specs.