I'm going to recommend from experience to just not run sneak/reanimate cards, super fatties or a large ramp package. If you don't want completely uninteractive games, I'd rather keep the mana curve down and find other things to do. Value reanimator like
Alesha, Who Smiles at Death is great though. I really like
Yawgmoth's Will in a fair cube since its often a techy divination/regrowth and requires a lot of setup to really be powerful and its pretty skill testing.
Gifts Ungiven is something my group has had a lot of fun with, even without
Unburial Rites, and we've had players get really creative with the piles, going for whatever recursion they can find, redundancy, even grabbing a bunch of delve/flashback. Pushing things like
Birthing Pod,
Sunforger,
Zur the Enchanter can force players to get creative. As far as clever resource management goes,
Sylvan Safekeeper,
Zuran Orb,
Nostalgic Dreams,
Seismic Assault,
Treasonous Ogre,
Meditate,
Psychatog,
Orcish Lumberjack,
Evolutionary Leap, come to mind as ways to kind of exchange one resource for another. I hope that at least gives you some ideas. I also love
Truth or Tale as a skill testing card for both players,
Parallax Wave has been super interesting and about on par with other sweepers and I've even seen it used alongside
Song of the Dryads to steal a game in a very entertaining fashion.
Depending on how extreme you want to go, you could outright remove 4+ power creatures and cards equivalently capable on winning on their own, or take similar steps to remove goodstuff if you really want to tell your players to get resourceful or lose.
But even steering your cube towards interaction and synergy goes a long way.