Best Job depends on choice which you may decide as follows:
For those who like foreign travel, an Assistant in MEA is the ideal option. They will compulsorily be working in foreign, for some years with very handsome perks.(Salary, Respect etc)
For those who require immediate promotion to Group A post, Asst. Section Officer and ITI are the best. Formerly Inspector examiner was good for promotions but not now as more Examiner were employed in recent years, this one will be promoted only after them.
For those who wanted to be posted in Delhi, Asst in CSS, Railways, and other Asst jobs in ministries are best as they will be posted in Delhi till retirement.