I have a friend who played a BM fighter polearm specialist. With a couple of feats he was a beast in melee. Still usual fighter vulnerabilities, being swarmed or dragon breath.
The base TT game doesn't have any special polearms, but if you take attunement into account - and I don't think BG3 does, special weapons and armour pale compared to attunement-less +3 versions.
I.e., you want to spend your 3 attunements on say belt of giant strength, winged boots and cloak of displacement. Rest of your gear is +1 to +3 stuff.
