Ugh.... well I'm a fan of rock/metal and Christian music if you can believe that. There are many Christian singers I think have 'make you cry' voices but I am not as familiar with them as I am with the rock/metal singers.
for male, I would have to say Jeoff Tate. Love his voice, nice range of vocals and could carry a tune.
for female, that is a bit tougher and it is out of my realm of listening choices, but I think Christina Aguilera has a strong and wonderful singing voice. Then Amy Lee would be my very close second.