I always end up back at TIs and they're the ones I always without fail get compliments either from the engineer or members of the public on their tone, or more correctly how I sounded in the mix. Funnily enough, the only strings I currently have across my basses are TIs, Rotosound SS, and Dunlop Super Bright Nickel 40-120. What do they all share in common? A massive mid-range character that most others don't. And by mid-range I'm not talking the standard low mids that 90% of brands nail. I'm talking about nailing that, plus keeping those high mids available if needed. These strings are the only ones that I've found do that. Special mention to the La Bella deep talking flatwounds in their lightest gauge 39-96 I think. It's the one labeled FX. These thump like their thicker brothers but hold their mid-range much clearer.