Can someone recommend a extremely good walkie-talkie with lord of frequencies
It doesnt really work that way. You have to pick a ‘type’ - as in what service you want to use and what country. For example, in the UK we have the no licence PMR446 system or you can apply for a licence for other uses. America has a very similar system.
The simplest one has power limitations because its designed as a small area coverage system. People all local to each other. If you choose a system with higher power, then range increases from hundreds of yards/metres to a few miles, ish. Longer ranges in general need better antennas and height, not power.
The good folk who run this forum are well known for chatting to people to establish what exactly you want the radios to actually do. Sometimes, they have to say no. As in your expectations cannot be achieved, but most times they can easily recommend what to buy.
There are bery few bad products nowadays, but some suit their prospective owners better. My eyesight, for example. I have some lovely radios that i hate because the displays are too small. For me, that matters!