Sandeep wasn't besura, prashant wasn't besura at all, and if Sourbhee wins she won't be besuri either, none of these seasons had any besura singer, but always for sum reason the least deserving wins!
and i have already mentioned these names earlier, gonna mention them againabhijeet sawant, rahul vaidya, prajakta shukre, emon chatterjee, monali thakur, Karunya Nc, Bhannu, Rajdeep chaterjee, Amit Paul (who has recently sung a song from luck by chance), Amey Date, Rahul Saxena and many more were amazing singers
Sandeep and Prashant were both besure, especially Prashant. And let's put it this way, that Sourbhee is the least besuri of the three finalists. The 4 seasons of II have been filled with so many besure singers...it's not even funny. And I have already mentioned that I don't think there's anything great about any of those singers except Karunya when compared to SRGMP singers...so I don't get the point of you taking those names again and again. As for how popular those songs were..well neither was mar jawan or pyar ki dastan that popular. You can say they were as popular as Mera dil.