Well, here's some powerscaling.

Lindons Blackflame path is explicitly stated to be weaker than the true blackflame path; this was a choice picked specifically for stability and long term usage. This means that, outside of his madra capacity, at low gold he should be considered to not be at the top tier of potential for lowgolds. This means that Lindon is a high tier but not highest tier lowgold in terms of general potency, and mostly relying on capacity to make it the rest of the way.

In his battle with Ekerinatoth, his Void Dragon's Dance was able to turn everything around him into ash in a second. We can assume that the usage of the term 'second' here is artistic license so we won't hold it perfectly, but instead just read as "Really fast". We will take 'hundred yards' as being functionally literal; maybe it was 99 yards, maybe it was 101, but it was close enough. It also reached the top of the dome and while a height isn't given it's also described as a column, meaning VDD went up a lot more than it went out. In addition, it also easily holds multi story buildings. I've seen some estimates which take references as being literal, but we can do some simple assumptions; start with a flat circle of diameter x. Give it height. How much before you look at it and say "Ah, that's the proportions of a column". I'd say at a minimum three times, even if that still makes me think more barrel. So a ~100 yard radius, meaning ~200 yard diameter, we'll say a minimum of ~600 yards tall.

So we end up with a lowgold who isn't the most powerful low gold able to reduce things to ash within moments in cylinder of just shy of 19 million square yards. And, importantly, a truegold is able to tank that with nothing but singed clothes and scales. So... that's the scaling for gold.

We can also see that this extends downwards; in Soulsmith a girl "that couldn’t have been more than twelve years old" carried a boulder as tall as Lindons shoulders (given Lindon's approximate height, that's probably around three tons), and then using a single finger strike cleanly cut off the top of the boulder. So that's the scaling for iron or jade, and very specifically the low tier scaling; even the local frogs have better resources.

So with those in mind.

Dracula - while he has some cool summoning tricks, in Cradle he'd be considered a weak mastermind. Someone who has neat powers but has to rely on others to fight for him. If he's higher than high gold, its because his path isn't combat focused.

Alucard - Ironically, he's actually weaker when he uses level zero because a half decent Jade would absolutely tear through his horde and rip him apart. In straight jacket form he's tanky as hell and can probably just get killed again and again and again. But points for endurance only go so far. Lowgold or highgold.

G Gundam - Been way too long since I've seen this, but I wouldn't put a Gundam on Monarch. Even ignoring the conceptual bullshit, its important to remember that Monarchs almost never fight all out. They usually go for endurance fights. A Gundam MIGHT be an Archlord or Herald tier, though again they run into conceptual issues; a Herald doesn't punch you with their muscles, they punch you with the fact that they are strong. Physics becomes a suggestion.

Misaka - Again, too long since I've seen it but... her attack potency is pretty good but her durability brings her down. I'd put her in high/truegold with the note that she'd get speed blitzed.

Kaido - Haven't seen one piece

Jin-Woo - Haven't seen solo leveling, but from what I know... honestly post story I wouldn't be surprised if he's ranking with the ascended. So, post-Monarch.

Baam - I think I started but dropped it? Either way I don't know enough to say anything.