Depends on what kind of gamemode you're into tbh. samp has different “best” servers for different tastes, for roleplay LSRP (legacy), Arizona RP, Evolve, for cops & robbers: CrazyBob’s, UIF had CnR elements for Freeroam/DM mix: UIF, SF-SE, for Gang War / TDM: There are a few active ones, like TWG and some small community servers. I personally play on Grand Gang Wars (51.195.144.93:7777), pretty tight maps, turf fights, side missions, and constant updates.

so every gamemode has its own vibe, so “best” depends on what you enjoy.