I’m a realtor and wet basements and crawl spaces poss me off, especially when a sump pump is installed to deal with excess water.

Here in the South and we get heavy rains (enough to cause flash flooding) and IMO the only correct way to protect your house is exactly what you described: take the top down approach and correct all conditions that allow water to pool. We have clay soil so that often means once you get the gutters sorted out you probably find you need drains of some sort but it’s a cheap fix compared to the damage water can do to a house over time.

I preach and preach this to my buyers and most do listen. I call myself the Gutter Evangelist. lol