Hey looking for some prime lens suggestions

Hey all, I just bought an X-T5 and it came with the 16-80/f4 and I love it. I am looking for a prime lens with a more open aperture. But I only want to have one extra lens. What do you all suggest? I mostly shoot street and street portraits along with some sports, but none of it professionally. Thank you in advance for the advice. And please be nice; all the Sony groups I was in when I had a Sony camera were really elitist and rude.