I personally have the Corsair Scimitar which I like quite a bit but I had to get used to how to hold it. I honestly think that if I were shopping again today I would just go with the Naga. I think that the Naga is a "buy once, cry once" type of purchase. Mice with 6+ side buttons is just a really sparse product category and if you can manage you should try to get a few of these mice in hand and choose based on comfort
Edit: I specifically chose a wired mouse. The battery in my old Naga was so heavy that I ended up taking it out and just using it wired anyways. If you don't need to be un-tethered, I would avoid wireless but again, that's personal preference
Those last 5 are absolutely unhinged and I love them. I think that number 4 is really the best choice though