As @bertbass wrote, it takes time to find the right gauge. 30-90 was very fun in the 80's. I have tried flats, tapes, bronze, nickel and SS RWs, groundwounds, exotic tunings, piccolo sets etc. I have listened to other people's comments about "the best" set, but in the 90's I started a comprehensive (and pricey!) test of different materials and gauges. B is 120 now, and as slapping isn't needed/wanted/popular anymore, the SS RW 40-95 has been the choice, for me, that is.
Testing different sets is time consuming and costs a lot, but after that you know what you want.
I use D'Addario and GHS, because of long scale basses, 34"-36". I know nickel would be very suitable for fretless, but I only buy two brands and two sets, and they are always at hand. I tend to change a set every 4-6 months depending on the use.