Mariah, i tell you from the experience i have, currently at this moment i have three angels in a tank full of livebearers and Neons and they are just fine, however the angels have been nipped a few times by mistake by my swordies mistaking their flowing fins for flakes...
If you worried about your guppy males, lets put it this way, i know that the guppy males will attract the attention of yours angels if you get them, however depending on how invokative your guppies are will depend if the angels will leave them alone, if you worried that is because of the large finnage, i have a hi-fin swordie male and my angels dont pay any attention to him and he has a HUGE hi-fin and is always speeding across infront of them chasing my females...
If your males are bright what i would suggest is a try out, buy your angels BUT retain your receipt and make sure you are elegable to return fish, then see if the angels pay any attention to your guppy males, keep a net handy for safety reasons, if your angels dont like them, simply take them back to the store you bought them from, if they do not take a blind bit of notice, then there you have it...
In the end, experiments tend to give the best results... But remember not every fish is the same, so they dont all act the same either