Best NPC for Baldur's Gate 2 Enhanced Edition?

Which must have NPC in Baldur's Gate 2 Enhanced Edition (BG2 EE)?

Aerie, Anomen, Cernd, Edwin, Haer'Dalis, Imoen, Jaheira, Jan, Keldorn, Korgan, Mazzy, Minsc, Nalia, Sarevok, Valygar, Viconia, Yoshimo, Baeloth Barrityl, Dorn Il-Khan, Neera, Rasaad yn Bashir, Hexxat?

A Guide & Tutorial for Baldur's Gate II: Enhanced Edition a Dungeons & Dragons game. Baldur's Gate II: Shadows of Amn, developed by Bioware Corporation and published in September 2000 by Black Isle Studios

There are many games set in the Forgotten Realms (Faerûn) Baldur's Gate III: Baldur's Gate, Baldur's Gate Siege of Dragonspear, Baldur's Gate II Shadows of Amn, Icewind Dale, Icewind Dale Heart of Winter, Icewind Dare II, Neverwinter Nights 2, NWN 2 Mask of the Betrayer, NWN Storm of Zehir.