I think he would beat most middleweights but not those two middleweights. They are better and more proven than he is. He can't match GGG's power and Canelo's combinations are a little faster. He is very good though and a dangerous fight for any middleweight.
Let's start with the likes of N'Jikam, Monroe Jr, Centeno Jr, Murray level opponents...
Even Lemieux would maybe be too big of a step... He's no Loma you know ...