Business Theme Suggestions

First post here, so Hello.

I’m going to be teaching a basic course to small business owners, showing them how to set up a simple WP site. I’ve been looking for 4-8 of the best free themes to suggest they should use. Dug around in the featured themes and did some Google searching but didn’t come up with anything that really stood out to me. I’m going to have to test the themes so I figured if you guys have some good suggestions it would save me some time.

I’ve got lots of premium themes to suggest already.

If you guys had to recommend maybe one or two themes for complete novices what would they be and why? Thanks