Some of the earliest entrance themes to be used are still the greatest. Anytime the Freebirds come out to Skynyrd on WTBS gets an instant pop from me. Ditto Queen and the Junkyard Dog around the same time.
Lawler's entrance when he returns at the end of 1980 and comes up through the stage to Strauss followed by the Star Wars theme is maybe my favorite entrance ever? Lawler also used the Rocky theme which was fantastic.
One that I cannot stand is Dr. Death coming out to Born in the USA, which is a lame song (not to mention it's complete satire).
Road Warriors + Iron Man was a perfect fit.
ECW had so many perfect fits as well. Although I have to say, the fact that the music was always so good really emphasized how great of an entrance the Dudleys had WITHOUT any music. Similar effect in the 80's when Andre never used music. The stir of the crowd was enough atmosphere.
I...can't take any of the songs created by the WWE or WCW seriously tbh.