i have a sohol tang, blue line grouper, niger trigger, and a black lionfish. had a gray bamboo, but after 7 yrs he picked up an infection. looking at a lepard and a smooth hound to come soon
You will want your tank to be at least 1.5 x sharks length in width(average figure). Being 6ft wide is good, but you are going for a good foot print. Will you upgrade your tank in the future? You can fit some sharks now if you plan to upgrade to a larger setup. You should be looking into Cat/Bamboo Sharks or possibly an epaulette.
You want as little rock work as possible and a smooth substrate. Triggers and Puffers may bite the shark/eyes and curing the infection/wound takes alot of skill and knowledge(I don't have it...haven't had any issues luckily). Maybe Josh or Matt will chime in with more info for you.
I was not planning on upgrading the fish tank
the base demenisons are 6feet by 2feet
Stock for 180 Gallon
1 Panther grouper
2Banded Cat Shark
1Tessellata Moray eel
1Dragon Moray eel
The live rocks woud be there obviously for the eels