People new to multipurpose WordPress themes will be delighted with The7 Design Wizard. It allows to choose basic settings like branding, colors, header layout, etc. and intelligently calculates all the rest. Voilà, your pro-grade site design is ready in mere minutes. Automatically!
Add a seamless integration with Visual Composer page builder, Slider Revolution, WooCommerce, WPML (as well as other most popular plugins), and you get the definitive web-development toolkit.
And, yes, it is mobile friendly (certified by Google) and SEO-ready.