Use of who for whom

Mr. Hans, whom I like, is a teacher.

Can I use who instead of whom like Mr. Hans, who I like, is a teacher?

I know that who can be used for whom in defining relative clauses like I know the man who(m) you like.

However, I am not sure about use of who for whom in non-defining relative clauses.

What do you native English speakers think? Thank you so much as usual.