Who sang what a lucky man he was?
No context provided
Who sang the original version of Lucky Man?
Emerson, Lake & Palmer
No context provided
Who sang the 2007 version of Lucky Man?
Shaw Blades
No context provided
Who sang the 2013 version of Lucky Man?
Greg Lake
No context provided
Who sang the 2014 version of Lucky Man?
Asia featuring John Payne
Lucky Man (Emerson, Lake & Palmer song)
https://en.wikipedia.org/wiki/Lucky%20Man%20%28Emerson%2C%20Lake%20%26%20Palmer%20song%29
"Lucky Man" is a song by the English progressive rock supergroup Emerson, Lake & Palmer, from the group's 1970 self-titled debut album.
Lucky Man (Emerson, Lake & Palmer song)
Shaw Blades is an American musical duo/group formed by Tommy Shaw of Styx and Jack Blades of Night Ranger, both of whom played in the supergroup Damn Yankees.
Shaw Blades
Gregory Stuart Lake (10 November 1947 – 7 December 2016) was an English singer, songwriter, bassist, guitarist and record producer. 
Greg Lake
"Lucky Man" is a song by the English progressive rock supergroup Emerson, Lake & Palmer, from the group's 1970 self-titled debut album. The 2007 version was sung by Shaw Blades, American musical duo/group formed by Tommy Shaw of Styx and Jack Blades of Night Ranger. The 2013 version was sung by Greg Lake, an English singer, songwriter, bassist, guitarist and record producer. In 2014, Asia featuring John Payne sung a version of "Lucky Man".