There's no such thing as a bass that cuts through the mix. Every mix is different. Every bass is different. Every mix has different frequency spectrum needs from each instrument. The arrangement and instrumentation and frequency curves of all the instruments are what makes any instrument cut through or get lost in a mix. The mix engineer is what makes any particular instrument cut or get lost in a mix.
And with the obligatory "for every musical rule-of-thumb, there are an infinite amounts of exceptions to those rules," I'm gonna second what @Gervais Cote said, if you play...
- Jazz, Fusion, Gospel, Pop, the sounds of late 80s and 90s studio musicians: Ken Smith.
- Hip Hop, Rock, R&B, Country, Motown: Olinto P.
I've had very limited experience playing other people's Ken Smith Basses.
I own an Olinto P (with a set of La Bella Jamerson flats on it.) I have 5 string Olinto P currently being made for me. I use my 4 string P for my electronic House Music project. I need the 5 for when i sub gigs. They're mostly Hip Hop, R&B, Reggae sub gigs. Think Pino playing Hip Hop & R&B tone-wise. (Also, Pino just had an Olinto P made for himself.)
I LOVE the neck on my 4 string Olinto P. And i really like how they lay out their 5 string P. The nut is the same width as the 4 string P and the string spacing at the bridge is still 19mm (unless you request otherwise.) Due to a surgery, I stopped playing for about a month & a half right when the weather started changing. When i picked it up again it was barely out of tune from the humidity change, but it was still in tune with itself. I only ever need micro-adjustments when i tune up.
This
interview with Freddie Washington is pretty great because he jumps back and forth between playing a P Bass (with roundwounds) and a KS.