I recently purchased new wheels for my g35 coupe I believe the tires are too big because the front tires are rubbing due to the sidewall I believe. They’re sized 35/50r19 if I keep them on is it dangerous? Should I downsize the front tires?

 

I'd take the car down to a tire shop and get their opinion. Without knowing both the spec on the tire (you posted the number wrong) AND the wheel there's not a lot we can do over the internet.