Yesteryear's greatest using today's technologies and Vice-Versa!

Whom do you think, among all those great masters of the more distant past would be absolutely amazing had they access to the technologies and training available to today's greats; and whom among today's greats do you think would have amounted to much less had they had to play this game 150 or more years ago without all of the bells and whistles available at their disposal today?  I know it sounds kind of scatterbrained; but I'd like to know from people who really like chess history. 

Of course I would absolutely dominate the competition if I were back then :). Joking, Magnus Carlsen wouldn't be that good because he would be in Norway and Norway wasn't too big on chess. Paul Morphy would be the most obvious choice to be amazing today since he was ahead of his time and understood positions well. Capablanca would also be pretty good.