Have to preface my thoughts with the comment I love a good car reantal thread!

For 5 adults and luggage, I would use Wilfred Brooks [TTOL sponsor], pre book an airport pick up, lots of room in his van
I would have the rental car delivered the next morning where you are staying [or later in the day if an am arrival]

That is our approach – we normally land 4 ish, makes arrival day relaxing and we get to catch up with Wilfred

My other comment is - instead of one large car for 5 why not 2 small cars, you can split up if you want to or drive "convoy" - smaller cars easier to park for sure
Have fun
J&B