I think you may have answered your own question.... People who involve solid caliber employees have a lot easier of a time hiring more of the same. Good employees always bring more employees

Have you looked at Twilio?

I've used AngelList. To be honest, I've had better luck with local connections outside of the industry. My experience with it (which is biased) is that depending on the industry you want to invest in, AngelList only serves those who already have investors or angels. In my humble opinion, to get in on the ground floor your need to attend conferences, talk to young people, see what new thing their friends think are cool. Again this is dependant on the industry your in, for example-- mining companies often won't be found on angel list. Every one who creates an app though... You'll find em there.

It's a great code repo. As a non-tech founder, it's still usable and doesn't take a lot to use to its full benefit.