The shrimp would get swallowed up too I think. Kole or scopus tang would be possible short term. Foxface get pretty big too. Any of those will have to be re-homed in a year or so. Clownfish (the smaller types, not maroons) don't belong in a predator tank IMO.
Sorry just read back and it was meant to be 55 gallon kole and 70 gallon fox face lol! And ok I've never had any experience with them tbh and I was just going by liveaquaria as a guide as this said 7 inches and 70 gallons. Any ideas of a more reliable place to get the info about fish sizes and tank sizes from?
Live aquaria tends to go larger for minimum recommended tank sizes compared to others I have seen. I tend to stick with them when making choices. I think you cant go wrong with larger, but constantly see people having problems when they go with smaller recommendations.
Sites that show fish like yellow or blue tangs being okay in a 75 or some larger angels being okay in a 100g worry me. Yes, they might be okay when they are tiny, but probably not so much as they grow.