like jinettes? try polish nobles. There stats are comparable too mailed knights (think they have 1 lower attack/defense and only 4 for charge) but they do of course have javelins... after about 50 yrs of campainging in europe and i have four stacks of 3 silver chevron polish nobles with better stats than any knight currently available and who throw armour piercing javelins of doom.
They destroy every other type of unit i've used them against so far. They're strong enough to ride down missile units of any kind and fast and mobile enough to avoid and shoot any melee. Like HA but tougher and AP.