I actually have! Not many, but that I can remember I've met like 4 other people who stutter throughout my life. One was a kid I used to go to school with, but his was pretty mild; my dad stutters a bit but he used to stutter way more, I don't know if that counts; a guy whose stutter was even worse than mine, first one I had ever met; and a guy I went on a date with once, his was mild too.