onion sets, garlic and shallots to plant. Also far too many potatoes.
From that list I would say;
1)Garlic
2)Shallots
3)Onions
4)Potatoes
The reason I put garlic first is;
It would have been better planted in Oct/Nov but as you were not ready I would say asap with them in the hope that they will get a bite of frost.
I don't know where you are so it is difficult to be precise with the other things.
So say next month for Shallots & Onions
The potatoes can wait a bit you certainly don't want them getting frosted.