I use the open source KISS launcher for years now. Your data never leaves your device, and you can expect to save battery life and speed up your device compared to complex and bloated launchers. KISS is just 250 KB and never connects to the Internet.

The best thing is that - behind a simplistic configuration menu - you can configure it from an ultra minimalist black screen with one text box to call when you need to launch an app, search for a contact, search on internet... to a full app drawer organized however you want (alphabetical order, your own defined categories...). It's just insane and unfortunately so much overlooked.