Lotsa personal bias in that.
Everyone has it.
Garand and The Ma Duece 1 and 2.
The rest.
I would put the MG42 STG 44 at 3 and 4 due to all the features and design from them put into wpns after them.
#5 for a bolt rifle .... The Enfield 10 shots and the ability to work its bolt rapidly.
Whatever...