Wizards 1977
I love the cheap rotoscoped WW2 footage. I love the animation (and the backgrounds!). I like the plot, and I disagree with people who think it's dumb that Blackwolf's secret weapon for organizing the armies of evil is literal fascist propaganda. I love the scene where all the fairy armies get wrecked in trench warfare.
I also love the ending:
spoiler
Instead of getting into a big magical fight with Blackheart, Avatar just fucking shoots him before he's ready.