Any team you put at 4 is getting steamrolled. It doesn't matter.
Notre Dame had a good 1-loss season with a big keynote win over Clemson. They are more than deserving, especially over the alternatives. 1-loss aTm whose best win is over 3-loss Florida but didn't even play in their championship game? Cincinnati is a worthy undefeated G5 team, but they'd get rolled, too. Coastal Carolina? See Cincinnati. Oklahoma? Been there, done that. Oregon? Would be worse than Oklahoma.
Notre Dame has earned the right to get rolled.