Non-Helper Formula based on example

C19: 
=LOOKUP(2,1/(($E19&$F19&$G19&$H19=List1!$B$2:$B$100&List1!$C$2:$C$100&List1!$D$2:$D$100&List1!$E$2:$E$100)),List1!$A$2:$A$100)