Aryan, 

BIT MESRA is a very good GFTI whose average package is around 9.11 lacs / annum and it increases for ECE and goes upto 10lacs/ annum. Almost every MNCs visit BIT mesra. 

IIIT jabalpur is also good but not upto the mark with BIT MESRA.  It's nirf ranking is 75 where BIT MESRA is within 50. The average package offered is 7.81 lacs/annum.

Talking about NIT Jamshedpur it's ECE branch is not so reputed and average package is around 6.5lacs/annum and it's nirf rankings is 130. Which shows it's not par with BIT MESRA AND IIIT JABALPUR. 

So I would say BIT MESRA IS THE BEST AMONG THE THREE.

BIT MESRA>IIIT JABALPUR>NIT JAMSHEDPUR.