Avada theme is a really comprehensive one. It has been used for more than a few years which is really nice when you're looking for support as most question will have been already answered. It works very well with Wordpress and comes integrated with page builders and sliders.

The reason why I also really like it is because you can install your favorite demo, and just work over the existing content rather than starting from scratch, but even then with fusion page builder it takes a few minutes to build a page layout with drag and drop. Also, once you install the theme you'll basically have instruction videos with-in the theme settings for most set-up tasks or questions.

I recommend checking out the demos so you can understand the features available with in.

https://themeforest.net/item/avada-responsive-multipurpose-theme/2833226