Well...any RP-PvE will work...just take a pick. Dont let anyone sway you to this or that, pick for yourself basically. Of course im abit of a believer in you go to a RP-PvE server you should atleast RP seeing thats what it for and some very hard core RPers believe you should just go off to a pve server so you dont take up spots for RPers.
It varies, sometimes the RP community is good sometimes its drama fulled.