Before I had to sell my last tank I had a flame angel for 3 years, a bicolor for 3 years and a lenonpeel for about 2.5 years. Also, I had a majestic angel for 4.5 years, a Regal for 3 (died because of a power failure)
I also had a flagfin angel for 4 years...
Keep the nitrates low, feed them a varied diet of frozen stuff that includes sponge, lots of live rock and give them seaweed sheets of different colors/kinds too. I also feed a high quality mysid shrimp too.