Hi. I just made a mono-green ooze deck with a few colorless cards to help it answer sceneries. I got a bit of devotion, so I added a karn and a ulamog. It plays pretty fun. But I need a way to deal with flying. What are good “green” ways of even colorless ways to do it?
Now that you've posted here it gives me a better idea of what to recommend.
The vehicles that you mentioned are a little awkward due to their high crew values, unless you run a lot of planeswalkers for Heart. To block a flier, you need to have both the vehicle and enough power of creatures untapped. If you want a flying vehicle, then Smuggler's Copter is you best choice, since it's decently-sized, filters your cards, and can be crewed by a mana dork.
If you want sweepers, Hurricane, Squall Line, and Arashi, the Sky Asunder are all good options. My personal favorite, due to your devotion subtheme, is Cloudthresher. It's big, it has flash, it kills both single large and many small fliers, it has evoke when your mana is tight, and it gives you a bunch of devotion.