Check the Mionix NAOS mices. Thouse are really great. I have the Mionix NAOS 5000. Sadly here in Argentina you won't see them. I bought mine from eBay.
I use the Sharkk 2471 gaming mouse. I use it for gaming and also program the buttons for business (copy/paste/cut).
Logitech G602 Wireless Gaming Mouse This mouse for gaming includes 11 customizable controls (buttons). You can assign any keyboard commands to each button using a special Logitech soft for this mouse. Of course, this high-tech mouse supports macros, so you can assign sequences of commands to every button. Also, the mouse is really durable - the lifespan of buttons reaches 20 million clicks. Look on bestadvisor.com or newegg.com reviews on it.
IamMaximilianKohler on youtube (I can't post links am new) has huge hands and does very in depth mouse reviews (he's also a competitive gamer). He likes the intellimouse explorer 3 which he's been using for like 10 years because nothing better has come along. You can get intellimice from aliexpress (Chinese Amazon) from a seller called ZOL who appears to have access to the factory machinery that made the original intellimice, people who order from him say the mice and their circuits appear identical to the originals. I've ordered one myself and will let you know how it is when it arrives. If you don't want to order from China you might have trouble getting an intellimouse 3 for a reasonable price.