Oops that makes it two people saying that MK was not a clone of Rafi. Ok I bow to the wishes of you two and put MK in a separate category. True that Vinit is a Sonu clone, so let me list Sonu separately.
I think Suman K really sounded like Lata except in the high pitches where she just couldn't match Lata. Remember "baad muddat yeh ghadi aayi" from Jahanara in which her voice gives way while singing "Aap aaye to zindagi aayee".
True that Debojit doesn't have a voice powerful enough to be called a clone of KK but KK is definitely the person he takes inspiration from.
Will update post!
Have removed Debojeet from there because I myself wasn't convinced when I listed him in the 1st place. Since this is a SRGMP forum, it would be relevant to include the contestants, I thought. Hope it won't start a new round of abuses.