Vision vs Ronan:
If its Ronan without the Power Stone, curb stomp for Vision. Ronan isn't exactly weak, but the best that he could be called is "a tougher or more skilled Drax, with a decently proportional ranged weapon". That's nowhere near enough to fight Vision.
If Ronan *does* have the Power Stone? Its gets much dicier. Does the fight take place on the ground? Because technically Ronan could just nuke the planet, which should probably count as a win even if Vision could survive by staying phased ( and I am *very* dubious he actually could phase through Infinity Stone Energy ). He otherwise also seemed to have power and durability at least on par with the Vision, bare minimum, which means the Vision is going to find it extremely hard to keep him from just nuking everything.
In theory, Vision ought to be able to play the game of "My Infinity Stone counters your Infinity Stone". However, the Vision never really demonstrated, in my eyes, broad sweeping competence with the Mind Stone. He has *one* feat of vast scope ( removing Ultron from the internet ), but otherwise it seemed to just be a loose power origin providing nothing beyond other characters of similar tier. Ronan didn't exactly seem vastly skilled with his Stone, mind, but he definitely could do stuff like "shoot stuff", so the burden isn't the same.
Quicksilver vs Spider-man:
Okay, what this boils down to is. . . Pietro is just plain faster than Peter. Peter has good superhuman agility feats, sure, and certainly can dodge bullets. However, he has nothing that really compares to stuff like "literally watch a bullet moving in slow motion, with said motion being considerably slower than his own movements". Or "take a person's gun, disassemble and unload it, and neatly sit the bullets on a table, so fast that you can't see him move". And, given that Quicksilver could otherwise do damage feats like "dismember Ultron drones with his bare hands", there certainly isn't any ambiguity over whether he could hurt Peter.
If Peter had the Iron Spider armor, things would be different, as now Peter would both have many more tactical options ( including possible AI targeting assists ), as well as sufficient durability that I'd start to doubt whether Pietro could hurt him much. Without that? The fight largely consists of the Spider Sense saying "Well, Peter, this is going to hurt."