Killscreenable (there is a new word for the dictionary) does narrow it down a lot, so although they are never ending:
Q*Bert - you can't go past that as a classic - even if you just aim for the 1,000,000 it's pretty impressive.
Bump 'n Jump - now this is for everyone. If I had the cash I'd offer a $1000 bounty on this title for someone to beat me - it's a classic, Golden Age, Randomness, Addictive Longer/Deeper - not sure about that, Long learning curve - for most people I'd say yes. If you're looking for a high score on this one, any one please chime in because I welcome someone to push me and my unverified record (because TG decided to suck balls last year) is around 5.8 million.