None tbh. At least not because of your stutter. By now I've met stutterers in all kinds of high-stress speaking positions, and they manage it fine. Call centers, sales, doctors, EMTs, lawyers, LEOs, CEOs... I've met a lot of stutterers. I *would* recommend choosing a career path you personally want and feel comfortable and competent in. If you feel spending all day on the phone is going to cause you constant misery, obviously don't go for that, because self-care is important. But don't let your stutter itself hold you back.