Lots of good suggestions.
May I add a few points.
If doing One to One, then (as said) discard the pikes, often replaced with swords or halberds for close fighting, such as when storming a house.
For small 'clumps' of troops (hardly units) rules like Pikeman's Lament will work.
If you fancy a Petard (upturned bucket of gunpowder nailed to a plank, which the attackers try to place against the enemy's door)game,
then I heartily recommend the EDNA (ever decreasing number system) and I think Foundry do /did a Petard party.