Part of this, it seems to me, is how you define undeath. There are numerous legends, like the above-mentioned ressurection/mummification of Osiris in which death is reversed in some way and a person is returned to an ambulatory state.
Orpheus, demigod of music, almost succeeded in bringing his beloved Eurydice back to life, failing only because he lacked trust in the deal he struck with Hades.
Not evil.
The goddess Persephone annually returned from the land of the dead in order to bring back Spring...her mother Demeter wouldn't allow Spring to return until she got her daughter back from Hades.
Not evil.
The deceased heroes of Valhalla are to return to fight in Ragnarok
Not evil.
The Asgardians ALMOST revived Baldur.
Not evil.
Whether these are actual cases of undeath is up to you. But the undeath = evil equation DOES ignore the numerous undead protector legends of European folklore, usually involving the ghost of a parent or lover saving their surviving loved ones.
Usually, these are touted as paeans to "undying love" as opposed to evidence of evil.
I mean, regardless of what you think of the movie itself, I'm pretty sure Patrick Swayze's Ghost character was NOT evil.
Perhaps the answer lies in HRing these spells to include intent, or perhaps introducing good or neutral versions of the spells.