I am still getting use to fallout but i wanted to try a melee/unarmed character for my first playthrough of the hardcoe difficulty. How annoying would this be for hardcoe if at all? (I also know how to kite aggro so i really doubt getting up close would be a problem for me)

melee/unarmed are the easiest class to play once you get a good weapon. I had a melee char with knock-knock and abandoned him at like level 23 because it was so boringly easy. this was on very hard/hardcoe.if anything, melee/unarmed armed chars are ideal for hardcoe as they dont have to carry a ton of ammo.

just aggro and hide behind something. they will run right up to you and you destroy them.

You should try it. hitting someone in sneak mode doesn't make a noise like guns do. so you can hit sneak criticals for awhile.