Runes of Magic Is a good one but after like level 50 or so it kind of becomes a pay to win game but you can still play it free to play.
Allods Online is also a good free to play has a cash shop but nothing to OP in it
Gates of Andaron reminded me a lot of wow with the look and feel has a cash shop but nothing to OP
Talisman Online I played it when it was in beta so I don't know if it's cash shop is op or not but it's a lot like wow as well.
Those are the only ones I played that looked like wow the most to me. There are also privet wow servers for any patch.