Best depends on your perspective of your usage & requirements.
Though I'd say
Offical LOS 14.1
which is getting weekly OTAs & monthly security patches. pretty stable as stock.
AOSIP 8.1 by Shubham
almost stable may be better in feature than LOS, I've used it for quite a while but its SE Linux is Permissive which causes some apps non functional.
Beside these two i also used LOS15.1 , RR & other Oreo ROMs they are currently under development but can be used as daily drivers because all major bugs like volte, nfc ect. has been solved in almost all Oreo ROMs for P2. But again SE Linux is not Enforcing in these ROMs so you'd need to root to make some apps run.
It'd say you'd try yourself which suits your requirements best use it as your daily driver.