In my opinion it's unnecesary to add more clips if the character only has 1 voice actor.
it's a bit pointless , being realistic , characters like Waluigi , Baby Mario , Baby Daisy and etc. sound exactly the same , it's not very relevant to a comparison as opposed to more actors as one character , sounding a bit or significantly different in their takes.
Nevertheless , more power to whoever wants to do so , i totally wont oppose, but i'd still think it's not necessesary.
Also, i know it can be tricky but it's ''Swiftie'' , not ''Swifite'' or ''Swifitie'' or ''Swettie''.