For a classic, charming, and somewhat naive Jem:
* Caleb McLaughlin: (Stranger Things) - He's got the right age range, the innocence, and a certain sweetness that could work well.
* Jacob Elordi: (Euphoria) - Could bring a bit more of a brooding quality while still maintaining the character's core kindness.
* Finn Wolfhard: (Stranger Things) - Has the right balance of youthful charm and earnestness.
For a slightly edgier, more rebellious Jem:
* Noah Jupe: (Honey Boy, A Quiet Place) - Jupe's talent for portraying troubled youth could bring a new dimension to the character.
* Asa Butterfield: (Sex Education, Ender's Game) - Has a good ability to convey complex emotions and could bring a more introspective quality to Jem.
* Charlie Heaton: (Stranger Things) - His acting range and ability to portray both vulnerability and strength could work well for the character.
For a more nuanced, complex Jem:
* Hunter Doohan: (Wednesday) - Could portray the character's maturity and evolving understanding of the world.
* Jacob Bertrand: (Cobra Kai) - Has shown he can play both good and bad sides, and could bring a depth of character to Jem.
* Gaten Matarazzo: (Stranger Things) - His comedic timing and ability to portray both lightness and depth could be a good fit.
Ultimately, the best actor for Jem Finch will depend on the specific vision of the director and how they want to interpret the character. Each of these actors has the potential to bring something unique and exciting to the role.