Need the best theme for static site and not blogging

All we can suggest is that you browse the themes in https://www.ads-software.com/themes/ The tag filter may help you narrow down your search to just the themes containing the features that you want. In theory, pretty much any theme can also be used for a non-blog site. Any additional functionality that you need may be added via plugins.

Thank you very much for quick response. But I guess that some themes must be better for a static site than others, so if anybody can recommend a theme or two, it would be very helpfull

No – pretty much any theme can be used on a static site. You just use Pages instead of Posts & create a static front page.