Jacob (Rise of the Tomb Raider); via the Divine Source
Evil/Dark Avel (Shingan no Yuusha); via Eternal Hate
Beatrice (When the Seagulls Cry)
Ange Ushiromiya (When the Seagulls Cry)
Battler Ushiromiya (When the Seagulls Cry)
All God Tier characters (Homestuck), so long as the death is not Just or Heroic
Icon (Geometry Dash)
Tenzen Yakushiji (Basilisk)
Tenzen Yakujishi (Basilisk) could resurrect infinitely as long as his symbiote is not nullified.
Utsuro (Gintama) could resurrect infinitely as long as he remains on Earth.
Henry Morgan (Forever)
Jason Voorhees (Friday the 13th)
Mr. Immortal (Marvel Comics)
As long as Phantom (Marchen Awakens Romance) has the Zombie Tattoo, he will always return from the dead.
Morgan le Fay (Marvel Comics) has been 'killed' more times and in more varied ways than any other villain in the Marvel Universe. Despite this, she has survived each and every single time, most often appearing seconds later after her 'death' seemingly unharmed.
Freddy Krueger (A Nightmare on Elm Street)
No matter how many times Mario (Super Mario) and his friends die, he can come back to life as long as he has one.
Phoenix (Valkyrie Crusade) will always be reborn, each time with a different personality.