Pre load
Everyone runs into the same issue with these rivets and given the fact that these are early in the process and quite difficult to access with some bucking bars it is not surprising to see these posts come up again and again with new builders.
I know you can't remove the rib at this point but I would use a pull dimple die to "repair" the hole somewhat before resetting a new rivet. I agree with the previous poster, that an oversize rivet is probably the best fix.
In addition, use a technique called pre loading the rivet to make it fit snuggly in that hole before setting it to final size.
Take your rivet and give it a tiny bit of squeeze to fatten up the shank a bit, so it will fit snugly in the buggered up hole. After that, set and forget!!
You have learned first hand that drilling out 95% perfect rivets will very likely result in a 85% perfect rivets. As you go on, you will think twice about redoing rivets for such very minor issues and I am certainly not endorsing sloppiness but more often than not, what happened here is what happens to almost everyone.
I can see from your pics that you hammered the flange next to the rivet, probably with a bucking bar that is too big for the job or just sheer awkwardness in that tight space.
Do yourself a big favor and get yourself a tungsten bucking bar.
They are expensive but you only need one of them, small and heavy.
I built my entire 10 with one bucking bar mostly riveting by myself.
You'll thank me later.
Now get to work, the 10 is a truly awesome airplane.