My favorite players are me myself and I and I have a model of each one of theirs
He played a strat in the early days (not REALLY early days, but early '70s, pre-Irwin) and it seemed like he mostly had his Irwin's set up for a very strat-like tone. Maybe with a few more options and a synth built into later ones, but still basically a strat tone. For me, about '70-74 was peak Dead and he was mostly playing strats during that stretch, so I still consider him a strat player. And to the extent I can come even remotely close to his sound (which I can't), I get closest with a strat...No.
Since you mention it, Jerry Garcia was my favourite player, but Doug Irwin guitars are not available.
No. I kinda went with PRS back in the early 90’s because I felt like I could forge my own identity with them, nobody I liked played them... and that’s still kinda true now. I mean, Carlos, John, Al, and Donna are cool but...
If I wanted a guitar like my hero, it’d probably be a Strat, and I hate those.