I couldn't care less about most forms of anime but I still regard it as an art form and Tezuka was a pioneer in it. It's a shame he went of stomach cancer...
Anyways, I'm a MEGAFAN of Kimba the White Lion. I absolutely love it. I really want to get my hands on the Jungle Emperor manga, but it has not been translated to English as far as I know and even if it was I'd have to find it online.
I love the theme about the relationship between man and beast, and I'm obsessed with lions, so it's natural that I would love Kimba so much. But Astro Boy I've never watched, but it looks promising so I may check it out eventually. However, I have no interest in robots so I'd really prefer to read/watch more of his animal-themed mangas/shows/movies... I really want to read his manga-I think it's called Phoenix?-about the phoenix of life, especially after one of the GamesGrumps guys said it was his favorite manga of all time.
Now besides Kimba, I have watched the first Fantastic Adventures of Unico. The English acting was annoying as hell, but I couldn't find it in Japanese, so I was stuck with it. I'm too old to be a part of its target audience but I did still like it. Definitely interesting seeing a guy get impaled by a spire in a children's movie though lol
I loved Ringing Bell, which I think was heavily inspired from Tezuka (being connected with Shonen, I think?) but not directly from him.
Let's see... the only other thing I saw was a short about two cats, and the cat's human kills his wife. "Why does man kill woman when he can't get along with her?" was the theme lol. Definitely different, a refresher from the same things you see all the time. It's entitled "Male."
So yeah, I'm not that well-versed in Tezuka but I'd like to be.
EDIT: OH OH OH I forgot Bagi, Monster of Mighty Nature. Way too weird for me, didn't like it.