I think the THPS3 and THUG2 albums are the strongest so it'd be hard to pick from those but from other you could go...
THPS1
- "Superman" by Goldfinger
- "New Girl" by The Suicide Machines
THPS2
- "Cyclone" by Dub Pistols
- "No Cigar" by Millencolin
- "When Worlds Collide" by Powerman 5000
THPS4
- "TNT" by ACDC
- "Express Yourself" by NWA
- "House Of The Rising Drum" by Delinquent Habits
THUG is also huge and hard to choose from, but I guess you could go
- "Millionaire" by Queens of the Stone Age
- "A Day At The Races" by Jurassic 5
- "White Riot" by The Clash
- "War Games" by Living Legends
and probably a few other I can't think of ATM
THAW
- "Little Girl" by Death From Above 1979 (my faves
)
- "California Uber Alles" by Dead Kennedys
- "Like Eating Glass" by Block Party
- "Astro Zombies" by Misfits (I think THAW uses the MCR version, but either is good)
- "What's Up Fatlip" by Fatlip
- "Live Wire" my Montly Crue
And I can't speak for Project 8 or Proving Ground cause I didn't play them