No one is forbidding any creatures; I recommend mentioning fewer "musclemen in loincloths" – it's off-putting, and it's embarrassing to respond to such messages. It makes you think you've ended up on the wrong website. Х)
Added 2 minutes later
The idea itself is not bad, as there are people interested in more or less "brutal" units.
And, in my opinion, a huge knight (not necessarily a human) in brutal armor with a bunch of attachments (spikes/horns/chains, etc.) will look no less impressive than a naturally buff Demon-Gigachad, with spikes, fire, and so on.
Added 2 minutes later
I started making knights with horses so that it wouldn't be like last time, and this horse is just awesome – I can remove all the armor plates and replace them with any others because the belt and bones are responsible for filling in the gaps in the model)))) This is great.