Gladiators by Stepan Alekseev
PERFECT
His whole gallery is basically a master class on ways that you can make dramatic scenes and compelling characters while keeping within armor designs that are (at least to lay people) plausible and pragmatic. I mean, look at this:
Stepan Alekseev is also on DrawCrowd, and CGPlus if you happen to be on either of those communities.
– wincenworks