There is a rivaayat that 4 prophets are still alive. means that they have not tasted death ..
2 in heaven, 2 on earth ...
name them ...
On Earth: Hadrat Khidr
In the heavens: Hazrat Eisa
Hazrat Idris never died on earth but instead died on the fourth heaven. Does he count amongst the ones in heaven?
Thats all I can think of at this moment. Still thinking...