Mike Miller's stats in his year with Washington, his 3 years with Miami, and last season with Memphis:
09-10 (WSH) - 10.9 pts, 6.2 reb, 3.9 ast, 33.4 min
10-11 (MIA) - 5.6 pts, 4.5 reb, 1.2 ast, 20.4 min
11-12 (MIA) - 6.1 pts, 3.3 reb, 1.1 ast, 19.3 min
12-13 (MIA) - 4.8 pts, 2.7 reb, 1.7 ast, 15.3 min
13-14 (MEM) - 7.1 pts, 2.5 reb, 1.6 ast, 20.8 min
I don't think Mike Miller is a very good example. He was more or less the same player in Miami he has been his entire career, only he played less minutes and had back problems.
I do think LeBron makes his teammates better, but no more than many other superstars such as Chris Paul, Kevin Durant, and Tim Duncan. He is the greatest player of this generation and deserves his due for that. I don't care for the influence he has had on free agency in the NBA, but he has been a model citizen off the court.