There are several good ones. Generac is big and others.
The generator’s Sine Wave is of great importance if you are running electronics. Almost everything now is electronic or has a computer in it.
An Inverter is the best but cost’s 50-70% more. Some generators can be tested and adjusted to produce the cycle’s necessary. Just be sure you unplug everything prior to putting your house on the generator. Turning off isn’t good enough. I had a honda 3000w and it worked out in winter because I had GAS heat and only the fan was required. Your average hair dryer takes 2000w and the garbage disposer caused a brief brownout. You really have to take charge and follow the rules. The ladies of the house were somewhat non-plussed.
I showed my better half the Green Acres episode where Oliver had a number on every electrical device and their generator couldn’t take more than ‘7’.