Okay... wow. Have played Jaime tonnnnnnnns. I was at Apex, was staying at jimmyjoes with Jaime. Not only did I play him a lot, I also saw him play a lot. Yes it was on console, but as we all know Jaime is the master at console to online transition. Not to mention p2ping with him a fair amount since apex. I know his skill level pretty well.
With Frogles, played 1v1 p2p with him for like 2-3 hours late one night. He ***** me. Harder than SK. because SK doesn't **** me. Was a while ago, don't know him as well, and I've gotten better since, so I'm probably least reliable about him.
With Zach... imo the best of the three, have played him 2 or 3 times in like 2-3 hours sessions. Super super good.
Have played star king a lot too. Granted a lot of that is console or offline emu, but wutevs. Got a good grasp of his skill level too I think.
Thing is, the 3 in my S tier destroy me more or less (maybe have figured out falcon vs samus against Jaime), but SK doesn't destroy me nearly to that extent. Sure he beats me more often than not, and he's really good, buts I can take games off of him somewhat frequently. I also know SK does well vs those 3 in my S tier. So he does pretty good vs S tier, but still doesn't completely dominate B tier... sounds like A tier to me. My definition of S tier is someone who ****s me in the ***. Star King can be SS tier in the U18 Tier List though!
About your A tier... tacos comes to mind. And you (wotg) if you were putting yourself in there (not sure if you were/not gonna check now). But like I said, post the whole list and it'll be easier to say who's clearly better than who.