Yamaha eu2000i. I have two of them that are compatible with one another for a combined 4000w (actually/technically a little less). You can get both for about $2000 or $1000 each. I use one the majority of the time for my 24ft enclosed trailer with 3 lights, radio etc. If I need A/C or compressor I use both. They are QUIET!!!! One pull, start right up!
As Jim said, the Honda compact generators are a good bet as well. Quiet & Reliable.
Your needs will be based upon voltage & watt needs. Do your electrical homework and you’ll be fine.