More than the "best" this is more like my cartridge journey:
I started out with a Shure M44-7 cartridge, purchased new, mounted on a Pioneer PL200 direct drive. It sounds bold and big but not particularly refined. It tracks really well, though. But the turntable itself sounded a bit lethargic compared to my next turntable - the Thorens TD 160 B Mark 3. On this TT, it sounded much better.
Up next was a Shure M55 which I got used. It was a bit more refined than the M44-7 but the stylus had seen better days.
The next one too was a Shure - an M97xE, purchased new. It has a nice balanced sound.
Up next was another Shure, the legendary V15 type III. This vintage cartridge beats the modern M97xE on almost all parameters - better high and low frequency extensions, while being more resolving.
My next cartridge is a Denon DL 160, a high output MC cartridge. It betters the V15 or the M97xE, especially in the mids.
The next cartridge was a rocket ride into outer space. From modest Shures to entry level HOMC Denons, it was straight to an Ortofon Kontrapunkt c cartridge, from a much higher price and performance bracket. The short time that I had the "c" was a pleasure. Very refined, well defined bass, superior high frequency extension, a hint of warmth while being the most resolving cartridge ever I have had in my setup, and a fluid midrange. The midrange was the most wonderful I have ever heard. It had a Soundsmith ruby cantilever and Soundsmith Nude Contact Line tip.
The next cartridge was quite a come down in terms of price bracket, but the Denon DL 103 showed why it has been such a beloved cartridge since its inception in 1962. With the right tonearm to match its low compliance, it can make serious music.
The next cartridge is a ZYX RS30-02. Way more refined than the Denon DL 103, and certifiable bass champ. This and the Denon 103 are my work horses. The ZYX operates on the Lenco L75 turntable and the 103 works on the Thorens TD124. Both are very likable.
My last purchase is a Decca London Super Gold. This beats the ZYX on all parameters except the weight of the bass. It needs a damped arm to play well. It offers dynamics and immediacy like no other cartridge, and has a midrange that is detailed yet warm. The highs are sparkling and pellucid.
What is unsaid here is that the above journey was accompanied by a constant evolution in phono preamps too (been through five of them!).