Pre-Crisis Darkseid is Darky at the height of his power. Even Pre-Crisis Superman feared him. He fought two Krytonians powered by Highfather and while controlling 3 billion Daxamites.
...but, with that said, Odin also had a time when he was at the height of powers. Silver Age Odin. During Marvel's Silver Age, Odin was basically top dog or one of the top dogs in the cosmic hierarchy. He had galaxy busting powers.
IMO, Silver Age Odin Vs. Pre-Crisis Darkseid - SA Odin would win.
In Odin Vs. Pre-Crisis Superman, Odin would wreck Supes. Odin isn't Thor. That arguement over whether Mjlnornir is just a blunt weapon or a magical blunt weapon that can hurt Superman isn't going to flew hear. Odin is a magical being. He's performed feats of magic and even referenced it as "divine might" or "divine power."
Since Pre-Crisis Supes is susceptible to magic, Odin (not Silver Age) would own that punk.