Mamluk: horse rider UU that shoots arrows while keeping a sabre in hand, automatically switches to melee if the enemy is up close and to ranged when it’s away. It shouldn’t be too confusing as the switch would be automatic, no need to click anything.
It’d require renaming the existing “Mameluke” Saracen camel UU into something like “Bedouin Raider” to avoid confusion. And historical mamelukes were primarily famous horse riders after all, Bedouins are a much closer fit for the existing unit’s name.