Which amplifier has high power gain?

I'm curious to know, which amplifier among the available options boasts a notably high power gain? It's essential to understand the intricacies of amplifiers and their capabilities, especially when it comes to amplifying signals effectively. With numerous models on the market, it can be challenging to pinpoint the one that delivers exceptional power gain. Could you elaborate on the characteristics that make a particular amplifier stand out in this regard, and perhaps provide a recommendation or two?