Give me some string suggestions!

You will love GHS pressure wound bass strings. GHS makes Ken Smith rounds bass strings, I think. They fell like flats but sound better. Great on my fretless.

 

Ken Smith Slick Rounds = GHS Brite Flats = Alloy 52 half-rounds (groundwound) = semi-flat in tonal character.
Ken Smith Compressors = GHS Pressurewounds = Alloy 52 "rollerwound" = semi-round in tonal character.

 

I've been through a lot of these.
The SIT Silencers are the best ground-wound strings I've played on flat feel but punchy.
I've moved to D'Addario Tape Wounds which are actually round-wound, but you'd never know with the tape wraps. These are amazing for fretless sound, the muah just jumps off the instrument. I've been running mine hard for over a year and they show no signs of wear

 

The SIT Silencers sound great, and I love them on my Jazz Bass... but my set is quite “grabby” which may not suit some players. They got a little smoother after a couple of weeks but still had quite a bit of surface friction. Awesome sound, though.

GHS Pressurewounds are a good recommendation, as they’re slick & have a clear sound with deep lows. I really love the Bronze Pressurewounds too, but expect a lower output - a very nuanced string though. Bronze = Subtle & Expressive, whereas the stock PW are more forward & agressive.

Also consider the White Tapewound & Copper Tapewound La Bella’s. Very bright but zero string noise. Smoothest Strings ever.

And I’ll go ahead and say it... TI Jazz Flats sound great w/ drive. They’re one of the only flats that I like with drive.