Since April, I've been using an Earthwise corded electric mower with a 20" cut path. I'm quite happy with the mower, even with the acrobatics needed to deal with the cords.
It has a 4" cut height, and the blade is super-easy to take off/put back on when it needs sharpening.
I'm in Indiana - zone 5b.
I made the mistake of killing the lawn at the next to lowest setting this spring. The end result was a rapid infestation of crab grass and clover.
However, for the last 2 weeks, I've been mowing at 4". The grass is already looking much healthier. Hope things greatly improve come late Sept and Oct when the weather cools and the crab grass dies off.
Tom