In my opinion, the derailleur pic shows a hanger that is definitely bent enough to produce all sorts of noises and/or sensations. A bent hanger twists the chain in addition to encouraging the teeth of the guide pulley and the cassette cogs to hit the insides of the plates of the chain, which would explain a consistent rumbling. A DAG would I'm sure reveal significant misalignment. At the very least it should be addressed before you shift into your spokes. Your chainrings are perfectly normal.