So the open grey plastic/resin models look like some kind of Oni, especially the one at the bottom right with standard Prayer Beads around his neck. Might try using that to look for more info. The bottom of the bases might say the company name as well if you haven't already looked there. The blue sprue in the middle appears to be Primaris Aggressors, likely from the Easy-To-Build kit judging by the blue plastic, lack of options, and obvious push-fit pegs. The Zealot Miniatures piece NiB
is one of their Minotaur line and I believe it to be the Brute Minotaur based on what little I can see of the legs stance and accessories as well as the axe with a two handed grip.
Here's a link to him so you can confirm since you'll be able to see more of the model in person. https://zealotminiatures.com/zealot-shop/#!/Brute-Minotaur/p/126618144