This depends on what you are after, of course, but we have some very highly recommended bikes in each category.
The best electric bike overall is the Canyon Roadlite: On – this feels like a normal bike that happens to have electric assistance. It is tremendous fun to ride, and the 2022 model looks better than ever.
The best urban electric bike is the Xiaomi Mi Smart folding electric bike. This is a great value bike: it folds, it has built-in lights, albeit in a slightly odd place, it's lightweight for an e-bike, and it's very reasonably priced.
The best cheap e-bike is the Pure Electric Pure Flux One – what a name! – is easily the best in this category as it both looks great and rides well.
The best folding electric bike for Brompton lovers is Brompton Electric. This feels uncannily like a normal Brompton, looks identical and folds in exactly the same brilliant way.