choosing a top melee champ

Hey guys! So i'm S4 and currently only play ranged champions or tanks (mainly mid mages). Any time I tried to play a melee champion I ended up messing up and I really want to change that. I rarely play top because most of the champions there are melee and if I do I play Jayce which is also ranged. So anyway, I really want to learn how to play melee and I thought about one of those champs who always look pretty good to me when I see other players use them: Irelia Riven Fiora

Which one of this would you think be the best to learn how to play melee champ and enjoy it?

thank you guys!