Basically, which theme you take, depends on the area in which you want to create your website. If it will get an online shop, a niche site, a blog site or anything else. Here I will show you my favourite best wordpress themes 2018.
The best free and most famous Wordpress Theme 2018 is OceansWP. It's especially useful for Business websites, portfolio, blogs and lots of other things. It's simple to use and has a wonderful and professional design. You can edit the settings for the mobile phone and desktop version. It offers a lot of functions and works like many themes which cost sth. The disadvantage of this themes there are included some feature which cost sth.
One of the best free wordpress themes 2018 is Astra, because it's a fast, fully customizable and very beautiful Theme. It's very useful for blogs, portfolios and business Websites. The support is very good and it's very often updated. Furthermore the theme offers special functions and templates. In conclusion it's a very good theme similar to use like the OceanWP theme.
Another great Wordpress theme is Customizr, especially because it's very fast and simple. It's optimized for smartphones too. With just a few clicks, you can adjust the content and and the appearance of the homepage. This theme is suitable for smaller companies, Landingpages and portfolios.
Awesome Collection!
I like to suggest Bloggers Lite WordPress theme.
It is excellent for Bloggers, writers, and authors who want to share their experience with the world. It has five different main menu layouts, homepage with left-right sidebar and other features.
More Info: https://wordpress.org/themes/bloggers-lite/