Moving to the Netherlands
Here's a good Netherlands site: iamexpat.nl
For the Netherlands, we used Ingrid van Boheemen expatonthemove [at] gmail.com. I believe Ingrid only does the Netherlands. She came recommended from our immigration lawyer.
We needed help with school search, and gave her some ideas of what kind of schools we had in mind to match our kid's personality and temperament (but you really can't go wrong with Dutch schools), and she connected with the schools to inquire about enrollment and paperwork stuff. We ended up making a friend in NL while on our scouting trip who sent her kids to a particular school that sounded very interesting, and so we asked Ingrid to look at that one in particular (which wasn't one of the ones she had found for us), and so she made a trip out to tour that school for us.
She also does apartment search stuff, but we didn't get that far because covid happened and non-EU citizens were barred from entry, and we sadly ended up not moving there.
Perfect English, prompt email responses (within a day).