For privacy, security, and usability, GrapheneOS is the best alternative mobile os by far. The only downsides are if you don’t like or can’t afford Pixel phones, and even GrapheneOS won’t have certain features you may need such as mobile device management, google wallet nfc payments, certain apps especially banking apps.
/e/ OS is not more secure than lineage. It tends to lag behind on security updates by months.
https://eylenburg.github.io/android_comparison.htm
For privacy, security, and usability, GrapheneOS is the best alternative mobile os by far. The only downsides are if you don’t like or can’t afford Pixel phones, and even GrapheneOS won’t have certain features you may need such as mobile device management, google wallet nfc payments, certain apps especially banking apps.