Below is the list of recommended Magento 2 themes selected for quality of the code, speed and included features.
Ultimo - Fluid Responsive Magento Theme
Ultimo is a premium Magento theme with advanced admin module. It’s extremely customizable, easy to use and fully responsive. Suitable for every type of store, optimized for SEO. Includes multiple variations.
Porto - Ultimate Responsive Magento Theme
Porto is one of the most popular Magento themes trusted by over 6,600 satisfied users. Includes multiple variations.
Shopper - Magento Theme, Responsive & Retina Ready
Shopper – is an extremely powerful and flexible premium Magento theme with responsive & retina ready design. This elegant theme is a great fit for a fashion and accessories store.
Jewelrix - Jewelry Store Theme
Jewelrix is best suited for jewelry stores. It's fully responsive layout is fully customizable and optimized for the top-notch performance across all devices.
Manhattan – Premium Theme
Manhattan – is a premium Magento 2 theme which will work well for electronic store, a mall or any store with a large number of top level categories.
Milano - Fashion Responsive Theme
Milano is a premium responsive magento 2 theme with customizable admin settings, untimated colors power admin, this theme includes 10+ extensions and 8 variations.
TV Suunhi - Fashion Responsive Theme
TV Suunhi – is a responsive Magento 2 theme great for a clothing / fashion store. Has 6 variations to choose from. Done on Bootstrap.
Elly store - Fashion Responsive Theme
Elly store is a responsive Magento 2 theme on Bootstrap. Includes 6 variations for the home page.