Having a nonstealth class following your stealther around(and you wouldn't have the Rogue as the alt, Melee breaks /follow and everything we do revolves around /follow) would kinda defeat the purpose of stealth, so either two rogues(and deal with the fun of re-setting melee every fight and mid-fight too + not being able to gouge cuz the 2nd rogue will still attack) or rogue+resto/boomkin druid since druids can stealth in catform too and can either heal the rogue or add caster dps.