Best Wargaming System for Medieval Battles?

[Aliess]

Warhammer ancients is my current go to. Apparently Hail Caesar is the successor, but I've not tried that out yet.
It's more focused on your generals giving orders to large blocks of troops then the stars on individual units.
Each "unit" consists of three stands which represents your phalanx, cavalry group etc. The game is scaled to work with 10mm models although we typically play with 6mm and it has rules to support 28mm. Or you can just use blank bases with flags painted on them to try out the rules