I would get Kishu and Gold Nugget for sure. I haven’t ever gotten a seed in those and they are easy to peel and delicious. Tango is very good as well, sets very well, but not as easy to peel as the above two. It also isn’t completely seedless. Considered seedless, but probably averages 1 seed per fruit.
Just added Yosemite Gold and Tahoe Gold this year, so can’t comment on those.
Have you considered Lee-Nova (88-2) as an early mandarin?