Most would probably say xzackly, but there are actually quite a lot of good players so it's tough to choose a single one of them. They all use different methods and some of them are more online than others.
But nevertheless I can assure you that I am nowhere near them skill wise - I also die a lot xD
People I play against I think are good are TNT58907 and Oskiss. I know xzackly7 is really good but I rarely play against him. :( Other players I know were (and maybe still are) good are old legends such as MCBall_Scrafty (iShiny) and rodeyoghurt.
I mean xzackly7 was gone for a while and came back one day and got a rating of 1980 something so I would say it's him or xWhoa(TNT58907). Oskiss is also pretty good. There also this really good player that nobody knows about his name is vaf12345 he's pretty insane. He's definitely one of the best xD.
There have been so many great players of the years, but even with so many good players, I think there is a single group that is just a step above even the best.
People on that list:
xzackly7
rodeyoghurt
MCBall_Scrafty
General_Sniper
craftforzombies
CreeperBoss719
Wolfie918
Limon02
JackMan825
Noah90808
Saiavaia
Mnieragent1
Snatman5000
It's not coincidental that almost every single one of them were chain helmets. These were people I was terrified to go up against whereas all the other good players I thought I at least stood a chance against.
I'd say that zack is probably the most consistently good player. When people regularly played MCBall, he was always around the same skill level and never got any worse. (He's a cool person too.) Scrafty was extremely good in his own right, but wasn't active for as long a period as zack was/is. Rodeyoghurt was good too, but suddenly stopped playing like Scrafty, and only returned to play in tournament 6. (Or was it 7? Whichever Delta won. I can never keep them straight.)
I don't really consider any of the other players in block's list on the same level as those three. I recognize nearly all of them,and they were all pretty good, but I wouldn't categorize them as "best." The only thing I remember in particular about any of them is craftforzombies repeatedly calling me out and trying to find evidence that I was walling (lol,) before he became staff and eventually left the server.
Delta won 6 and 7. Craftforzombies was superb in his prime, regardless of whether he accused you of hacking or not. Just to clarify, I am not saying that every single one of those players were on the same level, just that all those players are on a level above everybody else. For instance, I wouldn't say zack and snatman are on the same level, but they're both a hell of a lot better than mostly everybody else. It's too hard for me to actually make a list ranking them. Also, the list I made are of those players in their primes, not of their ability every single time they log on. Zack is as good as always, whereas when mnieragent came back briefly he was extremely rusty.
You guys are dumb to compare anyone to rodeyoghurt. He is easily the best player. If we were talking about eras, then that’s a different story. Beginning of mcball. Jadja. Later, JazzyWhale. Then Scrafty. But I don’t really remember all the best players from each era. But overall, rodeyoghurt is the best. Xzackly or craft for zombies come in second.
This is a very subjective term and a broad question. Everyone excells and lacks in different aspects. I couldn’t point my finger directly toward the “best” players.