A great TE is much more rare...
...and I don't think there is a GREAT one in the NFL currently. Kelce is very... very good, but he benefits from being in such a strong and diverse offense. Yes, he is part of that diversity... and yes, he is an all pro, but I don't think he matches up well with the truly great ones like Gonzo and Gates... he'll have to play a few more years to reach what they've accomplished.
That said... the all-time yardage and TD leaders are almost all WRs... so in the end, a truly dynamic WR is probably more valuable.
Is Pitts that guy? Is Chase? maybe... These two look to have more top end than Smith and Waddle... So if you are looking for a HOF guy... you are going Pitts first, then Chase.
If you are looking for separation, rather than dominance... you'll likely want one of the others. I can see a case for all four, but honestly... I don't think any of the WRs will be Megatron or Moss. Nice players, maybe even pro bowl players, but I don't see them dominating the game the way a bigger guy can do.