After my MILs passing we have '2007 Nissan Versa, 2006 Dodge Caravan, '85 Ford E 150 van, '95 Chevy Lumina APV for two drivers. My wife says, keep them all.
I'd think 2 is plenty..... two for sale and use the $$$ to do repairs on the keepers. .....or sell em all and start from scratch with two "new to you" newer used cars with less issues.
Do do anything immediately. Get over the death and having to deal with everything at once, and then do something with those. It will appear for keeping now, and then later maybe your wife will change her mind as she sees you don't need that many; or you may change your mind as you see uses for them all.