Originally Posted by WhB/K
i'am looking for a daily driver for my mobile.
The API-Level does not metter.
There are a lot of ROMs but whitch one is stable and contains the latest security patches?
If you are happy using a Nougat (7.x) based ROM (8.x is currently the latest official version of Android)
then, as mentioned already, LineageOS is your best bet.
It will have the latest monthly security update and is regularly updated.