Personally, I don’t feel like you CAN do melee “right” in FPS. I’ve never enjoyed a single first person melee game. Having to wade into melee while having no peripheral vision at all sucks, third person gets around that. Third person also allows for things like leaps, rolls, etc. that you can’t really do in first person without whipping the camera around like crazy and making half the playerbase vomit.
I think about melee in games like Nioh and can’t think of anything that comes remotely close for first person. Every FP melee game I’ve tried, the combat sucks. And that includes things like Vermintide. Just my personal opinion of course, not a declaration of fact.