I always feel comforted by Harlock and Galaxy Express. It is a compliment I rarely give anything.
Comfortable is right.
Captain Harlock has a bit more going for it in terms of linear continuity and storytelling from episode to episode.
Galaxy Express was so cookie cutter it got incredibly formulaic yet I ended many an evening with an episode right before bed.
There's a Queen Millennia show from the same Universe/made by Toei in roughly the same period but alas it hasn't been subtitled into English. So once I'm done with Harlock I have the Arcadia DVD to watch, then I might seek out Maetel Legend to close out that universe for a while.