The GHS Pressurewounds do exactly what it sounds like you want strings to do and are my #1 favorite string of all time. I don't use regular roundwounds on anything anymore, no need to. They sound BEEFY, big fat bottom, super punchy mids, and clear defined highs without being too zingy and bright. They make less finger and fret noise than regular rounds (but still some, they're not really anything like a flat), feel AMAZING, and last forever (I have them on two of my basses, one set's a year old and the other six months, and they don't really play or sound different than they did at two or three weeks). I'd recommend them above anything out there for what you're describing, and if anyone else thinks they seem even remotely interesting, they should absolutely give them a try because they're just the greatest damn strings in history. They're extra-fantastic for fretless, too.