If you want that clean Google look with modern features like Google Discover integration, these are your best bets:
A fast and smart alternative that uses a "Bridge" app to integrate Google Discover into its home screen. How to Install and Set Up Smart Launcher 6 ‧ Home Screen - Apps on Google Play
Specifically designed to bring Pixel features to any phone. It includes the "At a Glance" widget and the Google Discover feed.