This is a bit odd because it's hard to look at our favorites through non biased eyes. I applaud people who can do it better than me, but there's just no way that I can't look at Ric Flair and just give him 10s across the board.... the greatest wrestler of all time in my view.
I would say:
Technical 10 Even though his move set became more and more limited when he got over, there was never another wrestler in my opinion who knew his way around a ring more than Ric Flair. don't think there has been anyone in the history of wrestling, in my personal opinion, who elevated more wrestlers to look better than they actually were than Ric Flair. I know a lot of people think Shawn Michaels, but I politely disagree. Michaels lacked the humility Flair had and very often would refuse to put over another wrestler if he didn't like them for some reason. Flair very often would put over guys he absolutely didn't like: Kerry Von Erich being a prime example of this.
Performance 10 No one was cockier when he was playing the cocky heel. From the strut, to the wooo, to the disdain he had for his opponents. He could appear frustrated and it was obvious. He could and did switch from a heel to face during the course of the match solely based upon his actions. He could get his fans on the edge of their seats in worry by making it appear that he was completely outclassed.
Mic Skills 10 In my opinion, the best talker in the history of wrestling. He reinvented himself over and over again and had more catch phrases than any wrestler I could think of. He was able to be a heel and a face without changing much.
As Flair got older, he of course began limiting his move set. He also began taking on a more comical persona. But even late in his career, he was able to put on a few really good matches with Undertaker, HBK and Triple H. I enjoyed everything he did up until his retirement match with Shawn Michaels. To be honest, I just couldn't watch his TNA run but that's because I like to tell myself he retired against HBK.
I would not give flair a 10 for technical wrestling as he was not really that varied at his height. 10 for mic skills and performance would be fair enough. There are a lot of wrestlers better in ring than Flair IMHO. Flair has also indicated he thinks Shawn Michaels is the best of all time (excluding himself). Flair might be the greatest of all time based on charisma and career, as charismatic as The Rock and Stone COld are their wrestling careers were kind of short in the ROcks case and Austin was at the top of his game for 3 years, maybe 6 as an A lister.
Anyway Chris Jericho
Technical 9
IMHO Jericho is one of the best technical wrestlers and the only reason he doesn't get a 10 is I think there are better technicians than Jericho.
Performance 9
Jericho has always been good in ring, the scary thing is he can still have a great match in his 40's and can put over younger talent like Kevin Owens and his AJ Stiles work this year as well.
Mic Skills 9
I would almost give Jericho a 10 here but he is perhaps outclassed by Austin, Shawn Michaels, The Rock, Hogan, Flair, and Foley on the mic.
Overall I am leaning towards Jericho being the G.O.A.T and is more or less the total package only beaten in that regard by Shawn Michaels. Very charismatic and a better wrestler than some of the greats.
Undertaker
Technical 8
Performance 10
Mic Skills 9
The Undertaker had a large amount of technical skills for a wrestler his size and is very good in ring, just not the best. Performance wise the Deadman persona has been over with the crowd for a very long time and he can cut a great promo but he is not the best at that beaten by various wrestlers I would rate a 10 and perhaps slightly by Chris Jericho.