Male versions of Whitney Houston, Mariah Carey,Toni Braxton?

Hello, I'm working on my vocal skills and I have to sing songs that really make my voice shine. I'm singing "I Have Nothing" by Whitney Houston, "Without You" by Mariah Carey and "Unbreak My Heart" by Toni Braxton, and I was wondering if there are any males singing that kind of song. I can't think of any!! Is there a male version of those singers? Thanks.