First of all, your tank looks nice. Personally, I like your bubbles and I like your substrate.
I do have to say, your pleco looks to be a gibbiceps which grows too large for the best quality of life in a 55g tank IMO. Plecos are from the Americas. As far as I know, some stores merely sell Asian bred gibbiceps as Asian spotted plecos to make them sound more exotic. If there is an actual species out there called the Asian spotted pleco, I am unaware of it.
As was said, 3 angels do not tend to get along, but, yous look big enough that you would know by now if they were going to fight or not. Like Phish said, it doesn't matter that they are different varieties. They are all the same species and will interact as such, regardless of color variety.
For sure keep a close eye on your 2 rainbow sharks. Your cories appear to have some nipped fins in that picture, and the sharks may indeed cause issues with the cories or other fish as they grow up. How big are the rainbow sharks currently?