You need to give the user 'Allow Node Management Rights'. Users will have access to Manage Nodes, but will not have access to the settings page. If the user can't view Manage Nodes after you've granted rights, double check their menu bar.
Also, Manage Nodes means this user can delete any device in SolarWinds. If that's an issue, then use Custom Propeties and limitations to limit the users view. You just need to make sure the user adds the correct custom properties when they add the device. If they forget that step then they will lose the ability to see that node.
