Cherries aren't really good tank mates with Angels. It's not that they would be aggressive to them, they just get wound up and can be a bit over active for the Angels' likes. Especially if you have a school of them with at least two males. They aren't as bad as Zebra's though.

As for Cories, no, they are not algae eaters. They are bottom feeders that clean up anything that falls to the ground.