I own about six, but three are old cheapies.
My main three are these:
First off, I prefer mallets.
Odyssey Dual Rossie I. This was the original putter from back in Year 1, when Odyssey was first becoming popular and was struggling to keep up with the sudden rush of orders of their putters. Long before they were bought out by Callaway or anyone else.
I used this same putter for many faithful years.
A few years ago, I tried a putter in the store, a Nike OZ model #6. Fantastic at both lagging and accuracy, and definitely an improvement.
This putter is very strange looking, as it is very large from toe to heel, with weighted wings on each end. Fantastic Moment of Inertia, such that the thing just doesn't twist.
If you can get used to the strange appearance, it is a real winner.
Last winter I was in a golf store, and it was "TaylorMade" promotion night. They had periodic raffle drawings for prizes, with the top prize being a TaylorMade Corza Ghost putter.
Yes, I won it.
My brother-in-law had just purchased the same putter a couple months beforehand, and I got it for free.
I still use the Nike OZ Model #6 putter 70% of the time.
I use the TaylorMade Corza Ghost about 20% of the time.
I use the original Odyssey Dual Rossie I putter about 10% of the time now.