I found some pictures of Hitler paintings
here. Judge for yourself.
Personally I think the landscapes & buildings are quite good, the dogs are less good but still good, the flowers are bad (they look either half-dead or fake) and the people are shit.
I had a conversation with someone once about the psychological possibilities of his apparent inability to paint people, connecting it with his pure wickedness. Interesting talk, though, admittedly, I think we were stoned.
At any rate...
Listen Killer, it's an interesting concept and one which does get explored here from time to time but plausibility is a pet peeve on this site and you're going to have to get used to that.
Hitler, like probably most people in that area at that time, was essentially a racist and an anti-Semite and was these things in an era in which it was not absurd or frowned upon to be so.
Your non-racist Hitler is an admirable quest, but sadly, it is very implausible. Being flexible with your OP challenge is also something you'll have to get used to here - and you'll be glad for it eventually when more interesting conversations (rather than arguments) become the result.
That being said, the holocaust is NOT inevitable. Hitler hating Jews probably is but the holocaust is not. So if the prime directive of the non-racist clause was to avoid the holocaust, then you must know it can be done without making Red Hitler the ultra-tolerant carebear that you are demanding and that posters here aren't buying.
Secondly, the German Revolutions in 1918 and 1919 were doomed to fail and no amount of young Hitlers can change that. Hitler being a young ultra-Nationalist AND beginning to convert to Communist/Socialist principles at or around this time is not impossible but him getting involved in the Revolutions will probably hurt him in the long run.
The best options presented here thus far have been the ones concerning a more Communist-friendly Hitler embracing the Socialist part of National Socialist more readily and being more influenced by the Strassers. If this is done early enough, the Nazi Party of OTL, albeit more Strasserist, could even receive some Soviet support (in spite of its Nationalism) during its violent rise to power and take control even more impressively than OTL (though differently, obviously: commie-hating will be off the propagandist menu).
If Communists and Nationalists can be united under a Redder Hitler, then you have a plausible and interesting scenario for such a WI. He's still going to hate Jews but he may not massacre them. He's still going to be an asshole who annexes and invades his way into a second World War, maybe even on the side of the Soviets during a blown up Winter War scenario...
...hmmm...
...I like that.
It is the single darkest World War II imaginable with the coolest propaganda art.
Either way, you should probably relax the rules a little bit on this one so that everyone can offer plausible and interesting scenarios without a thread derailment.