7. Kashin Koji
Kashin Koji is the most well-known member of Kara till now. Kashin Koji is somehow able to use the toad summoning technique and is even able to use the Rasengan. This is the reason that everyone thinks that he is somehow related to Minato Namikaze and Jiraiya. Also, if he knows how to use these two techniques it is almost evident that he will be able to use the Sage Mode of Mount Myōboku as well. Thus, making him a new sage mode user in Boruto.
6. Konohamaru Sarutobi
Konohamaru Sarutobi is a Jounin level shinobi from Konohagakure. He is a former student and admirer of Naruto Uzumaki, the Seventh Hokage of Konohagakure. Since Naruto taught him Rasengan almost as soon as he learned it himself, and Konohamaru knows how to summon toads, I’m sure that he might have taught him to use the Sage Mode of Mount Myōboku as well.