Help me choose a backpack for Ryanair

I’m looking for a backpack for some 1–2 week trips around Europe and I’ll mostly be flying Ryanair (the 40x30x20 dilemma)

I’m currently looking at the Osprey Daylite 26+6, CabinZero Classic 28L or Military 28L and Cotopaxi Allpa 28L

one that would fit the gate controls and still being reasonably comfortable to carry around

I’m leaning towards the CabinZero because of the size/weight, but the Osprey seems more comfortable? The Cotopaxi also looks great (I have the 42l already and I love it), although I’m a bit worried it’s too big for Ryanair?

thank you