Ones with DLC aren't ones you need to worry about. Own the DLC? Check. Done. Play it on something.
1,000,000 Points Club? Ha. That's 'play any three-dot song with a fullish band, harder song needs less people'. 2112 nearly gets you to 1,000,000 on guitar solo, doesn't it?
Doesn't Green Grass and High Tides have lots of hopos?
I'm too lazy to check through all the other posts here, but I know a few HOPO heavy songs off the top of my head:
Wanted Dead or Alive (RB1/RB3 DLC)
Green Grass and High Tides (RB1)
Alabama Getaway (RB2)
Free Bird (RB3)
Blue Sky (Pre-RB3 DLC)
If am correct, I think that Everybody Wants to Rule the World and Something Bigger, Something Brighter had a couple of HOPO heavy parts, but not a whole lot compared to these other ones.