At 6'-5' & 220 lbs., I can relate. Although I wouldn't consider myself broad shouldered. My biggest issue is my 38 1/2" inseam, which kinda puts the steering wheel between my knees in most non-full sized vehicles.
I bought a Jeep Cherokee and made my own seat adapters that moved the driver's seat back 2 1/2" & it still wasn't enough, so I sold it 4 months later. After shopping around a bit & sitting in several vehicles, I've decided I'm stuck driving a full sized vehicle. I just ordered new "orthopedic" seats for the van that are a bit pricy, but are specifically made for people 6'-4" and taller. I had an opportunity to sit in them and it's by far the most comfortable I've tried. They are a bit wider and sit a little higher and a little farther back than the seats I now have, which come out of a Toyota Sienna, and are pretty nice. Not only is the seat back 3 1/2" taller than their "normal" seat, the lumbar support sits higher in the seat back where it needs to be for me. Also, the base of the seat is adjustable so I can scooch it out towards my knees so it doesn't hit in the middle of my thighs like most seats. The biggest difference I noticed immediately upon sitting in them was that my shoulders weren't hitting the top of the seat where it starts to narrow toward the head rest. They actually hit where they are supposed to and I don't feel cramped, or too tall for the seat.
I have to wait 8-10 weeks because they come from Germany & this whole covid thing is causing major delays in international shipping. It's a big investment, but if it allows me to drive in comfort and drive for more than an hour or so before my back and the sciatica down my left leg starts acting up, it will be well worth the money.
The seats are the Scheel-Mann Vario XXL with full side bolsters & incorporated heater.
Hope you find something that fits you....