Could also use some Quintessons. 4in ReAction one is okay if you go for the smaller version of them, but we need a larger one.
I kind of wish they'd just reissue the earthrise one, or at least make a new version that has the paint apps on the faces it's missing. Hell, release the box set one's color schemes before they scrapped and changed it last minute somehow. The jet base effect thing is too short on allof those, but I think if they extended it they'd inflate the thing to leader price.
Anyways I'm still glad I got one quintesson before scalpers started squatting on them for 70 something fucking dollars. Keep stalling on getting a custom base for it so it's not constantly toppling when I nudge wherever it's sitting at whatever given time the last few years. Two if you count the box set one I got around when that came out haven't opened yet despite aiming to at some point.

They should also do an official figure of this guy, be it reaction or ultimates or mainline or whatever. They managed to retool the alicon into the bailiff quintesson so this guy's probably doable via similar methods, though they'd need to do a severe ass retool.
Also goes without saying the one exclusive to the judgement pit set as a mini figurine to be used in the base mode of the quintesson should be released as a full sized figure someday. I missed a chance to get a 3d printed unofficial one in sandstone of all things a few years ago when shapeways was still alive and affordable. Genuinely baffles me with how varied and memorable the different quintesson designs are they just never make shit involving them with occasional exceptions like earthrise just dropping both the 5 head and alicon versions in one go or weird made up unrecognizable ayylmao shit like the transformers one quintesson figure.
EDIT: Oh, the transformers one quintesson has a quintesson styled face, so it is recognizable enough... but the rest of it's just kinda... yeah.

Cool design still but it could use a lot more color.
The Ultimates line does seem to have more articulation and the bigger size is cool, but like the R.E.D. line I’m lukewarm towards it at best. If I’m getting a non-transforming guy I’d rather sink my money into a model kit.
Ironically yolopark and that other company that's line goes by like 3 different names (blokks, buluke, blokees, all the same shit) the last year made articulated "model kits" in that general scale that are cheaper than reaction figures and are basically snap together simplistic figures. I already talked about them I think but it doesn't change the fact they're really nice albeit a bitof a painin the ass to find sometimes without some kind of upmark.

As far as I know right now only the latter has prowl but if you can take action master-y stylization that one's probably your best bet for scaling.