I think that 338 yard distance shown on your google measurment tool is pretty good to be within the consideration of your question. However, the green shape and orientation isn't, owing to the shallow or narrow depth of the green on that line make and it becomes a fools errand, for the hole depicted.
I do think it is a valid and interesting design concept. If the green has a direct 'as the crow flies sort of line of 340-380 to a pin, with a slight landing area of 10-30 yards depth in that foregreen area, and has a deeper green design that makes it tempting for a big hitter to have a long shot odds or gamble of holding the green if calculating a rare strong wind known to come up now and then at the geographic location and hole direction of the proposed par 5 being considered for design, I like it. Of course the green shape has to function for the 99.5% of of the people that play it conventionally and approach on second or third shot.
How about this: Take this same hole #6, and in a sort of contrarian way, have a slight pennisula built into the lake out from the back tee on that same line - about 30 yards into the lake, for a member sort of tee. Ironically, that pennisula tee would be as long or longer on the conventional line played up the conventional FW. Make that tempting carry about 280-90ish. Then (while it can't be done in this example due to location of 7th tee) but if the green was made a bit deeper on that hero line, making it within the realm of possible, I think it could be a valid design concept.
Why shouldn't there be a remote possiblity of a HIO on a par 5? And, if it came at a place near the end of the 18 hole loop, it could be the ultimate pivotal hole in a tournament for a strong player, trailing 3 strokes behind with 2-3-4 holes to play.
Would we have to call a -4 of par something gargantuan, like "Pterosaur"?
