I use a Z/I Delta 2. Though the design is dated, in some circles, I've found it to be a putter that does what I ask of it. It's fitted with Lamkin Crossline Pistol grip.

BTW: I also own, additionally, a 2nd brand new Z/1 Delta 2, which will be put into service if the current one is retired/lost/stolen or abducted by aliens...