One of the thumpy-less-sustain hollows/semi-hollow like the Ibanez Artcore basses, with flat wounds, experiment and find the perfect mute (I use rolled and stitched felt I have my wife make). Then playing it with a more upright right hand stroke..
it won’t fool anyone into
thinking it’s an upright, but it will a) sound good and b) will actually fit the role of the music appropriately.
I have not heard a very convincing alternative to this, and a lot of the other approaches to ‘replacing’ upright not only sound less like a double bass, but also just don’t sound
good or
fit the musical role well at all.
just as a drive-by shot, I’ll go ahead and throw out there that I have never heard a tapewound approach to this that sounds good.. they do give you a chance at the thwap-clicks of an upright, but the tension and envelope are all wrong, and generally they are too floppy and will never sound right. If someone has some secret tape wound that don’t play like weedwacker strings, let me know.
check out Gustav Broman. He has a fantastic approach that lines up with my stated ideal of fitting the role and sonic space in a convincing way. One of the very few guys with a non-cringe electric jazz sound.
https://instagram.com/gustav.broman?igshid=MzRlODBiNWFlZA==
Edit: here’s a random video of gustav.. not sure if this is the best representation or anything, it’s kind of just the first YouTube video I found