So I am hugely picky with the mouse I use - and probably spent way too much time researching mice before I purchased any of them. I have a few favorites, but all of them are Logitech
This one is one that my sister has and I borrowed to see how it felt and it was awesome. They have a left handed version too. It looks funky but is super comfortable, the scrolling was very quiet and you can customize the buttons (and adjust scroll etc.)
https://www.amazon.com/Logitech-Ergo...09J1SYX5B?th=1
This one is wireless (so that may not be something you like) and it isn't cheap but I think for what you get it is reasonable.
I am using one of their scroll ball ones now - though I have the MX Master Mouse on my Christmas list (it may work left handed I'm not sure) I haven't seen the tracker one in left handed though.