Oh my. Those are huge words my man.
The short answer is that Martinez will NEVER be the best middleweight in history, hell he ain't even in the top 50 middleweights in history.
And even if he had the talent to - and he has neither that nor the amateur pedigree to do so - he's too old at this point to EVER be considered at that post. So first, you must scale back that type of rhetoric.
However, it's really up to him. He didn't fight at 154 long ago, so if he wanted to meet at that weight to fight Pac or May I wouldn't be judgmental, although I don't know how much of a good decision that would be at 36 years old.
Guys always score points from me for fighting outside of their weight class - guys like Duran and Hearns and SRL did it, as did a lot of the old time greats, so I give major props for that.
At this point though, Hopkins is far too large- he's fighting at LHW and couldn't come back down to 160 at his age.
Ward is MUCH bigger as well, and fights at near 168 most of the time and has speed and power and the pedigree that would decimate Martinez in my opinion.
But, it's wide open at this point. Just remember he doesn't have long left, especially with that fighting style of his that wastes a lot of energy.
Honestly if I was him, I'd do whatever the fuck I had to do to make 154 and challenge both of them to fight for the biggest payday I'd ever seen, then I'd retire and live in Argentina like a king.
So.... what you're saying is that your division sucks so much that your two favorite fighters are career 160 and 154 lbers.?