What lens would you suggest getting next?

I have a DX frame Nikon and currently I have the 18-55 kit lens and 50mm 1.8G. I like portraiture both indoor and out, as well as landscape. I never photograph anything super speedy, or wildlife - the fastest things I photograph are pets and rarely. I'm not too fussed about running back and forward and I actually prefer my prime to the zoom… I would really quite like a super wide angle. I'm throwing in things here, there and everywhere actually sorry ha.
Anything you can suggest from the ramblings I've given, any brand!

A couple I'd recommend;
- an 85mm f1.8 prime - lovely for portraiture I use it both in the studio and on location. Also makes a great lens for candid street photography;

- the Sigma 10-20mm ultrawide angle - for wide, dramatic landscapes;

Have also used the Sigma wide angle for environmental portraits, especially in small spaces!