I wouldn't put Cousins on that list of players ahead of Kyrie as I think they're somewhat comparable. Also, with respect to the question, I'm pretty sure Irving would fetch more than a mid-first and Buddy Hield, but that's another conversation.
I also don't put Paul, being constantly injured and never getting out of the first round, ahead of Irving.
So I've got:
LeBron, Leonard, Curry, Durant, Davis, Giannis, Westbrook and Harden. I'd also put Butler ahead of Irving on a seasonal average basis, but not with respect to talent, or careers; Irving is ahead there IMHO.
And with all that said I think Irving is right there with Butler and Cousins, that 8-10 (11?) space. I think Cousins could be much better than he is, but he's a headcase. Butler is playing really well right now and is having a phenomenal season, but I think Irving is the better player between the two overall given past accomplishments - and again, I think Irving has the higher ceiling between the two players, but that remains to be seen.