In the old days I used to run it that they could, but those evil things aren't angels. They might have technically been devils but I never really put too much effort into it. But I did colour code for my convenience, even had neutral "angels" for the neutral gods. But even in those days I preferred non-angels for ALL my gods. Lawful gods having lawful outsiders (made my own ), good and evil gods using the spectrum of the alignment. For chaotic gods I never had any substitute - they could chose from the CE and CG ones depending on their preference but in general I ran them as too chaotic to use legions like the other gods.

These days I run it differently. Good gods use angels (well technically not angels, but a stand-in, a "good only" outsider). Evil gods use undead. This is how I make undead evil in my setting, they are literal servants of evil deities. They are tools certainly but I'm quite happy about the twisting of the soul turning innocent souls evil but not outsider just undead evil.

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