Emperor Angel 90g

I currently have a 90g reef tank stocked with the following:

2 ocellerous clowns
2 fire fish
1 banded goby
1 pajama cardinal
1 matted file fish
1 melanurus wrasse
1 Bird Wrass

My dream fish would be an emporer angel..... Would it be ok to add one to my tank? live aquaria reccomends a tank of at least 220 gallons.... I see all that time at LFS and on the internet these fish being kept in much smaller tanks....looking for some insight here

Thanks!