The other songs (except 2MTM) with that similar riff are:
White Spirit - Midnight Chaser (1980)
Budgie - Wild Fire (1980)
Riot - Swords And Tequila (1981)
Accept - Flash Rockin' Man (1982)
These are the ones that sounds really close to the riff in ''2 Minutes To Midnight'' (1984).
There are some other songs that also reminds briefly this riff:
Venom - Welcome To Hell (1981)
Tygers Of Pan Tang - Hellbound (1981)
Dio - Stand Up And Shout (1983)
Saxon - Power And The Glory (1983)
Mercyful Fate - Curse Of The Pharaohs (1983)
Grave Digger - Heavy Metal Breakdown (1984)
Helloween - Phantoms Of Death (1985)
There are probably more songs with that riff - this has to be the most copied riff in the heavy metal & rock.