Welcome Bobbie.
I like a generous mouse as well and we've enjoyed superb service from Logitech mice. Their web site has the search option for "Large/Full Support" and retuned a number of products:
https://www.logitech.com/en-us/mice?filters=3873,3876
However, the best advice I can give is totally unrelated to mouse make or design. That advice is to reverse left- and right-click functions.
Assuming you are right-handed, look at how unnaturally we have to hold the mouse to stretch for the left button we use so much:
My hand hurts when I have to use the left button for everything. When you make the RIGHT button the primary, your hand position is more natural and relaxed:
Give it a try. Even non-ergonomic mice feel better this way.
AJ