Hueman is a modern free theme with 80k active installation. It is regularly known to provide significant exposure on mobile devices, load quickly, and be very easy to use. The theme comes with a page builder you can edit with drag and drop.
Minifying CSS improves performance for your website overall by reducing the load time. Keep the mixture of non-visible images. It can improve speed realization by decreasing the weight of large pages that include many. Theme comfortable with Nimble Page Builder.
If you want these features, you will need the pro version: font customizer, Feature content builder, grid style, and more advanced customization.