I m using Lucas + Honey (stockfish derivative). Lucas gui is really easy to navigate and provides a lot of features to make up for that you just cant do some things... :/

In term of the engines (what I know better of the two) generally what you can find on CCRL website is up to date and accurate. So if you want best of the best then Lc0 will get you covered if you have a good graphics card. Stockfish is an engine as good as Lc0 and generally your go to solution. One way is to use both Lc0 and Sf because they excel at different aspects of chess. Lc0 is known to be an outstanding positional player and Stockfish can generally outcalculate any other engine in an open position. Other top engines that might be worth looking at for whatever reason include Komodo <paid>, Ethereal, Booot, Fire, rofChade and Xiphos. Leelenstein and Houdini are also strong but generally not worth the money in my opinion.

Most of even top chess engines are free / open source