Don't get old games! There are so many better ones with more balanced/interesting/entertaining mechanics. You should look at videos on Dice Tower and Wil Wheaton's TableTop channel on YouTube. Everyone's tastes are different though.
This is my collection with ratings based on how much fun we personally have at game night. (Our group is a good mix of casual, competitive, cooperative, gamers and non-gamers.)
What kind of friends do you have? Would they prefer something confrontational, interactive or abstract?
Here are some good video reviews. Forbidden Desert is my favorite co-op.
If you like Checkers/Chess style games, Tsuro is great.
Some other similar (short, cut-throat) games: Blokus Trigon, Hey, That's My Fish!
If you insist on Clue, try to get your hands on The Great Museum Caper. It's out of print but you can still find it used online. Way more fun than the original.
If you like dexterity/recognition/reflex games, Ghost Blitz and Pick-a-Pig are a rowdy pile of fun and laughs.
If you're just looking for a party game, Cards Against Humanity is like Apples to Apples with highly inappropriate sexual/political jokes and potty humor. You can print your own version at home for about $10.
Another fantastic free game that gets infinitely more fun with lots of people is Telephone Pictionary.
If you're looking for an RPG theme without the actual RPG part of it, Red Dragon Inn is about brawling, gambling and trying to drink each other under the table.
And then there's RoboRally, which has already been mentioned a few times here. You're a computer in a robot factory trying to race around flag grabbing laser mazes.
I am CERTAIN any of these will suit your needs more satisfyingly than Trivial Pursuit. ;)