None. I do not believe that any coach can write a "best program". For several reasons:
No two persons are exactly alike. While a "general" program (a program published on a website not designed for a specific person) will work great, it will not be perfectly adapted to everybody. I believe that training is all about "solving problems"... finding a weakness or trouble spot that someone has, and finding the best way to fix it with training. As such the "best program" for someone will not be "best" for everybody. Furthermore what was "best" for you a few months back might not be "best" anymore because you might not have the same problems to fix.
The goal of training is NOT to do a list of "chores" (sets and reps of exercises) it is to create a response from the body. The important thing is NOT the program. There is nothing magical about doing something written on a piece of paper. What's important is the physiological reaction that happens in the body when you do the program. I always preferred to focus on the quality of execution rather than on the piece of paper. So to me the "best" program depends on what you execute in the gym not on what is written on a piece of paper.
A program has 4 purposes.
(1) to protect the extremists against themselves... passionate peoples tend to do too much if they are left to themselves and slow down their gains because of that, the program gives them boundaries to respect to keep the training manageable
(2) to structure training in a logical way. Everything will work provided that it's not foolish. A lot of people have no structure in the gym, what they do lacks rhyme or reason. You can't get optimal results like that
(3) to motivate you. I honestly believe that the ONLY thing that really matters to get results is working hard, with a purpose/high focus. If you do that any program (that is not stupid or illogical) will work. A lot of people who follow a "known" program (something that was written by a top coach for example) tend to be more motivated and focused. They get seduced by a concept and that gives them more confidence and motivation to train hard, as a result they get more gains. The program that gets YOU amped up to train might not be the same one that gets ME amped up to train. And the one that amps you up the most will be the "best" program for you.
(4) to give you a progression model and a way to fix your weaknesses. When to add weight, when to add sets, etc. And which exercises and methods to do. A program is ONLY THE PHYSICAL REPRESENTATION of a STRATREGY aimed at making you progress. What is important is NOT the program, it's the strategy behind the program. While a program you find on the internet can work GREAT for you, if it fits your needs, it might not be the best strategy. And it's important to understand the strategy behind the program to see if it's a good option for you.