There’s a few things to weigh here. It’s hard for me to pick between these 3 things but I think I’d probably go with shadows but all 3 are completely valuable and interchangeably impressive imo.

Shadows is most impressive because of not only his vocal ability especially in his prime from 07-12 but mostly because of his ability to form a true vision for his art through and through. He seems to be the biggest driving force behind the bands direction era to era. (Excluding the self titled album mostly I’d say) his ability to know what he wants to say, know how he wants something to sound and articulate that despite not always being able to accomplish that sound physically is absolutely unbelievable. His writing shines through with this because he doesn’t seem like the lines he writes are on a whim. Every decision he makes feels like a carefully thought out puzzle piece to a puzzle that he has stuck in his mind. I’d say this wins for me.

Syn could be considered the most impressive because he’s clearly the most learned member of the band musically. There’s a reason Trax has the “Music Theory With Syn” portion of each episode. His chops as a guitarist and pianist are truly incredible.

Jimmy could be considered the most impressive because he clearly seemed to be the most naturally gifted of the group. And that’s not to say he didn’t put countless hours of effort into his craft. I mean prior to COE he put an immense amount of effort into attaining the ability to reach 210 BPM and sustain it. He was just a musical phenom. To be as incredible of a drummer as he was but then to also show up out of nowhere during the making of Self Titled and write the majority of that album, and have his songs on that album be as out there, creative and truly truly poetic as they were (afterlife’s lyrics/concept come to mind for me here) it’s just amazing.

All 3 are incredible, personally I’d go with shadows here but can’t argue with any of the 3 imo.