Yes, another big fan. Just bought a Totoro DVD off e-bay a few days ago, in fact. And I've seen Spirited Away no end of times. Saw Howls Moving Castle with my kids the day it opened in NYC last year. . .I literally couldn't wait. Interesting to hear about these other films of his, which I haven't seen.
I don't really know anyone who does similar type films, BUT there's that quite good French animated film from 2003may be too grown-up for kids, but maybe notcalled "The Triplets of Belleville." It's more wry, less innocent, but awfully quirky. . .
I'm a bit obsessed with Hong Kong/Japanese/Korean films--though apparently the ones that we get over here are specifically marketed to western audiences, which is interesting. If you're looking to rent films for yourself (these would NOT be suitable for kids) I'd recommend directors like Wang Kar Wai (Hong Kong), and basically all those Tartan Asia Extreme films like Park Chan-Wook's (Korean) vengeance trilogy (Old Boy is great, but violent & difficult with themes like incest). And then there's the Japanese film Battle Royale. The Asia Extreme films tend to be violent. For a purely beautiful and non-violent Japanese film, there's After Life directed by Korreda Horokazu.
Don't know if this answers your questions, but maybe we have similar taste, so maybe you'd like these other films too.