The "real life" archetypes of these are actually exactly that: renaissance parade armor. They were never meant to be used in battle, and they're not medieval. Medieval armor, if at all like that, would be way more pragmatic and light weight. There was a short period at the end of the middle ages (15th century) where knights would really wear very heavy armor, and that was the end of that age. See: battles of Crecy and Agincourt.