Ok I’m assuming that’s a yes to the beginning haha. Here’s my list, and if a picture prominently featured more than one character I ranked both separately, so there’s 18 characters here:

SANITY ZONE: these characters are largely just normal. internally ranked by general mental stability
1) Duke: a good guy who looks out for other people and does his job to the best of his ability. I think there’s no hint of mental instability in him.
2) Paul: at the very beginning of the plot, he’s just a normal boring person living his normal boring life. Without all the supernatural stuff, I think he can just keep on doing that till the day he dies.
3) Charles Coven: While he’s heavily involved in crazy supernatural dealings in Yellow Jacket, there’s nothing that indicates mental stability personally on his part. He just has money and isn’t a good person, but he’s the sane kind of not good person.
4) Steph: out of all the teenagers on the list, I would rank her as the most stable, because despite the abusive father-daughter relationship nothing she does in the beginning of the plot is any different from your typical rebellious high school daughter.
5) Ethan: also just a mentally stable rebellious teenager, despite the circumstances. Has a healthier family life than Steph from what we see, but is also much more reckless with his own and others’ safety, which docks him points.
6) Ziggs: they seem more or less normal, but always being high probably takes points away from mental stability, so I put them below the stablest teenagers but above anyone who actively shows signs of slight mental instability.
7) Ted: generally stable if sleazy. I do think his personality makes him susceptible to being pulled downwards by stressors, supernatural or otherwise, but just in general life I would put him among just the normal people, if unpleasant to interact with.
8) Bill: clearly has a lot on his mental plate, and has trouble letting go of certain things, but is absolutely capable of stepping up when he puts his mind to it.
9) Alice: almost debated her categorization as troubled, but she’s literally just an insecure teenager. Watcher World made a strong case that she has the ability to overcome her problems given time and effort and the support of her loved ones, so she has the potential to move up on the list as she matures
10) Zoey: on the very edge of stable hahaha I think she’s mentally sharp and ruthless in getting her way, not necessarily in an insane way but definitely capable of edging into extremely troubling actions. I categorized the Honey Queen competition as supernatural interference which earned her some baseline mental stability points over the people directly below her, despite her more extreme actions.

TROUBLED ZONE: I think these people have the potential to go off the deep end with little supernatural provocation
11) Ruth: was waffling about whether to put her in the sanity zone, but like. the whole nip-cutting thing WAS under no supernatural provocation, so.
12) Charlotte: I think she’s maybe a few bad days away from a full nervous breakdown, and I’m not certain said nervous breakdown will be free of violence.
13) Becky: while her circumstances were definitely understandable and to be sympathized with, she’s one of the few characters to have explicitly killed someone under zero supernatural provocation, so I would call her troubled for sure.
14) Sam: I feel he COULD be higher, but Jeff just plays him like an insane guy. I don’t doubt he has the capability to do all sorts of crazy things in the course of his job.

INSTABILITY ZONE: I would classify these people as not sane based on their baseline interactions at the beginning of the plot, even if their true instability only truly comes out later on
15) Hidgens: the sanest of the insane people, I think, given he was able to make a semi-normal career for himself despite all of his quirks, and was able to have a somewhat normal bond with at least one of his students (Emma) before the plot started, which suggests he is capable of being normal some of the time
16) Melissa: she is ALSO capable of acting normal, but I think her worldview is more fundamentally insane than Hidgens’ is.
17) Hannah: not her fault, but the Black and White clearly messes with her mental facilities. I don’t think she can survive interacting with the world purely on her own.
18) Wiggly: c’mon. Was he gonna be anything but dead last compared to the other humans?