I agree Ohtani is a media darling.
Seager just goes about his business. I don't know that his locker room presence provides that motivation to elevate the other players, but what he does on the field, in terms of effort, commitment, and rising to the occasion has value. As mentioned, the Rangers played some of their best baseball without Seager. That kinda works against him.
The Rangers were a better team without A-Rod. He did everything on the field and certainly got media attention. But him turning in Ryan Braun and Manny for using PEDs, because he himself got caught, demonstrates why the Rangers were a better team without A-Rod.
I don't know how Ohtani is in the locker room or perceived by his teammates, but the media attention he and Trout got, IMO, seemed like a distraction. The fact the Angels would shift the rotation to accommodate Ohtani, could be perceived by the other guys in the rotation as an issue.
The Angels screwed themselves at the trade deadline. They were likely out, but at the urgency of Ohtani and a hope by the team they could turn it around to keep Ohtani was a failure. Now, they gave up prospects. They increased their Payroll Tax costing them 2 Rds in draft compensation for Ohtani.
I'm hopeful.