With Nyquist, we've seen flashes of a high skill level and creativity. Not on a Datsyuk level, but enough to believe he could be a real good top 6 forward that sparks the offense. Much like Datsyuk though, he has to get a lot stronger to maximize his skill. So there's definitely a lot of potential there, but he has to want it and be committed to it like Pav and Z were.
Tatar on the other hand doesn't have the pure skill or creativity as the other 3 IMO, but he still has the skill set to be a real good player. And as we've recently seen, he's further along than Nyquist and more of a sure thing. Nyquist has a higher ceiling though. But Tatar's skating, puck control, and offensive sense is already at an NHL ready. He can be an effective 3rd liner with some offensive flare, or he could develop into a 1st or 2nd line winger. I really like the growth we've seen out of him and I love the passion and intensity in his game. His time in the AHL should effectively be over with now.