Can the list card choose the Ruin Runner?

No, The List cannot choose a Ruin Runner with its activated ability.

According to RiftJudge FAQ #11380, The List’s activated ability requires you to choose a specific unit with the named tag, which counts as targeting that unit. Since Ruin Runner has the ability "I can't be chosen by enemy spells and abilities," an enemy cannot target it with The List's ability.

This interaction is also supported by Rule 355.10, as the ability is not a programmatic selection but rather an active choice made by the player.