Preadator(s) for 100+ gallon?

[Sa777]

I recently built my own tank. It's long (about 6ft), and currently empty. I am interested in putting 1-4 large predators in it. I plan to plant it. Any ideas? I prefer fast streamlined predators over bulky cichlids. I'm already thinking about some pike cichlids or red tailed barracudas.

 

[bettaowner]

Bucktooth tetras would look amazing. Another option would be a few African butterfly fish with a peacock eel and an African knifefish.

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[ppo8820]

You should get the super rare, but awesome Boopty Boop sticklepig fish. They are almost never seen in captivity and are a collectors dream.