At this point, it almost goes without saying but, the return of Anthony Herrera/James Stenbeck has to be the best execution of the return of character that I have heard, read about and seen. Kept totally under wraps, filmed on a closed set, the secret kept until the shocking reveal. To this day, when I see that episode, despite knowing what comes next, when James removes his hood and utters those famous lines, it never fails to give me a chill. It is not the first time a soap has staged a character's return from the dead but it certainly inspired many imitators, which is unfortunate, as most returns from the dead are usually cheap and clumsily executed. Returns from the dead have become a somewhat tired soap cliche since.
Now, you have an epidemic of soaps killing off characters just to try to 'goose' ratings, with no plan going forward. I think, due to Stenbeck's dramatic exit, it likely helped inspire an even more dramatic return.