The (original) Star Wars Battlefront of LotR. Honestly super fun, it's a shame the multiplayer didn't last long before being shut down. The campaign is a blast, especially with a co-op partner.
Look, they failed at stretching LOTR over the Battlefront skeleton, it's undeniable. That said, playing "Hero Matches" in the shire and spamming everyone's OP moves is hilarious.
Not particularly immersive as it's just an action game that occurs in the background of major LOTR story events. However, it's one of the more fun Lord of the Rings in terms of combat and multiplayer. Particularly good for a session or two with friends.