Any old car wheel bearing grease is good (and way cheaper than ‘bike greases’ which 9 time out of 10 are just rebranded general greases at 10 times the cost). I’ve used various general greases over the years.
A thick waterproof grease stays put better and makes it really easy to place the balls and keep them put whilst rebuilding. Something like Morris K99?
If you are using QR hubs worth reading the articles by Park Tools and/or Sheldon Brown regarding correct cone adjustment (i.e. make sure to leave slack in the bearing adjustment to allow for the QR tensioning the axle).
Try Halfords, eBay, or any automotive store. I make a spreadsheet up showing cost per gram and go by price.