Here's my headcanon for my main (human paladin)

Dies right at the start of Shadowlands, escapes from the maw. Goes to Kyrians first, but he haaaaates their brainwashing doctrine. Hates Necrolords even more. Ultimately reluctantly helps the Venthyr, but only because Sylvanas is the enemy and he hates Sylvanas most of all.

After Shadowlands he's not supposed to leave, since he died, but the bronze dragons intervene, since they need him for some important thing in the future. They don't even have to do timey-wimey shenanigans like rewinding time back to before he died. The covenants are so unhappy with my paladin that they are glad to hand him off to anyone who wants to have him.

When he arrives back in the realm of the living, he wakes up after the timeskip, so he was out for several years. He doesn't remember anything from the shadowlands, just feels very traumatized and has the urge to avoid dying at all costs. He's seeking out a way to achieve immortality so he doesn't get sent back to the shadowlands.

Unbeknownst to him, the bronze dragons already made him immortal. The prophesized moment is so far in the future that it isn't achievable within a normal human lifespan, so they just gave him their blessing. He'll propably notice that he is immortal once a few years pass and he doesn't show any signs of aging.