It may seem obsessive to make rankings for a 2018 draft while the season isn't technically over, but would someone criticize Bill Belichick for preparing a year in advance?! This is what the greats do, and on top of that, it's a great way to gauge how you feel about players before being tainted by the numerous rankings in the fantasy community that will pop up by mid-June. 

Here's my personal top 15, not taking into account any specific league format:

1. Todd Gurley 
2. Le'Veon Bell (dependent on his contract situation) 
3. Ezekiel Elliot 
4. David Johnson 
5. Kareem Hunt 
6. Leonard Fournette 
7. Antonio Brown 
8. Alvin Kamara 
9. DeAndre Hopkins 
10. Odell Beckham Jr. 
11. Derrick Henry 
12. Rob Gronkowski 
13. Melvin Gordon 
14. Dalvin Cook 
15. Julio Jones