Probably BIGBANG , 2NE1 for sure , iKON and WINNER haven't come to America yet , f(x) and After School for sure , AKMU, Wonder Girls for sure , Girls' Generation, Apink, and Sechskies
My word, this is a very pessimistic thread... never lose hope, people.
The only groups you know for sure you'll never see are the ones that don't exist anymore (and possibly not even then)...
Look at it this way; I had no expectations of seeing any k-pop group at least for quite a while, and then got to see Stray Kids and Dreamcatcher within about three months, and all going well, Day6 in January too.
While I have issues with how they run things, and I'd absolutely check out a competitor if they come up, I think at the moment, your best bet would be check out your favourite groups on MyMusicTaste and get behind (or start) a campaign to get them to a city near you. If they know enough people want it, it can happen.
Probably Monsta X...
Wanted to see them this year but couldnt go... and now I am not sure if they will even come to my country again...
And even if they do, it probably wouldnt be the same anyways...
I thought I would never be able to see Ateez or Monsta X but I ended up getting VIP for both. Don't lose hope or give up on your chances to see your groups.