Question what are the basic functional weapons to support the majority of Warlord / Fighter / Ranger / Rogue builds?
Truthfully you don't need very many weapons in the game. Most of the distinctions are fairly arbitrary. You need basically a dagger, an arming sword, a bastard sword, and a full two-hander. Then you need what? A club/mace, an axe, a hammer, a flail, and two-handed variations thereof. Then you'll want a spear, and a pike for spears. A poleaxe, a glaive, and maybe a fork. One and two-handed staves round things out. That actually covers all the basic forms of weapons.
There are some minor variations, like slight variations on chain-type weapons, a few variations of swords and daggers (back swords and sabres, punching daggers, etc.) but those ESSENTIALLY function in nearly identical ways with the more conventional variations (which probably explains why they've never been very prevalent).
Of course you also have your thrown weapons, this produces a throwing axe, a throwing knife/dagger, a throwing hammer, adds throwing to spears (javelin is just a spear that you can throw, no reason to make it a separate weapon, you can just describe some spears as 'javelins' if you like). There are also various 'darts', which would include things like shuriken.
Finally you have the true missile weapons. In terms of general weapon characteristics you only need 2 crossbows, plus maybe a 'hand crossbow' (these did exist, mostly used by heavy mounted troops in the late medieval period), a light and a heavy bow, a sling, a blowgun, a spear thrower, and then a couple oddballs like the lariat, boomerang, and bolos, which are all kind of unusual.
Beyond that there's not much, aside from maybe nonlethal mancatchers and nets.
EVERYTHING else can be categorized as one or another of these, and I'd argue that any weapon proficiency more specific than these simply makes no sense.