#3 Arisa Nakajima
Arisa Nakajima is perhaps most famous for her epic 2013 JWP match with Kana, now known as Asuka in WWE. Nakajima, known for her technical abilities, brings a level of emotion and intensity to her matches that few others can match, which is why she's one of the top names in Seadlinnng today.
As a veteran already at just 30 years old, she would make a great addition to Stardom, given her mat wrestling abilities, brutal German suplexes, and patented Cuty Special move. While she may not be the youngest or aesthetically-pleasing wrestler in the joshi scene, she more than deserves the chance to earn a higher-profile in a larger company than the financially-struggling promotions she's spent her whole career in thus far.
It also stands to reason that Nakajima could become a trainer for upcoming talent at some point, using her skills to help usher in the next generation of talent behind the scenes.