Tua is better than anyone from 2018. Plays with better rhythm/poise/grace, better feet, processes info quicker, and he's about as accurate as it gets.
Beyond Tua, I'm not sure. I thought 2018 was a little overrated, but I'm not particularly high on any of the other 2020 QB's. I do think a higher than normal amount of QB's have a legit shot of working out, but I don't love any of their chances individually, and I think landing spot will be more important for them than Tua. Herbert and Love would do well to sit a year - maybe the Chargers if Rivers comes back, or maybe SF treats Jimmy G like Alex Smith and lets one of them sit behind him for a year. SF would probably be the ideal destination for either.
Love I wouldn't touch with a 10 foot poll a this point. For as impressive as his arm is (and it's damn impressive) he just hasn't played well this year. Honestly If I was him I'd do what Tyree Jackson should have done and enter the transfer portal and go to a better team and better competition. People may disagree with me, but he seems to have regressed badly.
Yeah the 2020 class is tough because outside of Tua (and even he has some minor questions) there's a lot of guys with high end talent but a lot of yeah buts on them. Herbert and Eason (if he enters) exemplify this to me.
Burrow to me is intriguing. The drastic improvement is something that is gonna bring up a lot of questions, but if he keeps doing what he's doing you cannot ignore him. Especially with what he is asked to do.
But again, at this point in time, it is Tua if we get the chance at him.