actually, there are two ways to look at this, from a championship standpoint and a business standpoint...
I think the panthers and heat overall have had more success than the marlins, when u add in the awful years after the world series, it just brings them down....
Panthers have made it to the playoffs a few times, including that cup run...the heat until the last few seasons were a good team, especially the one in 97 ? that was in the Eastern Conference finals...so u cant really say what franchise is teh best besides teh fins...
As far as the marlins argument is concerned...how can u say they are the most successful, when they cant even get their own stadium, its tougher for NHL and NBA teams to achieve success, since they have a salary cap....and both the heat and panthers have their own arenas...
theres so many ways to look at this...