According to the definition of icon just one...Vega Sicilia (as you said).
The others (Jerez) are just secrets...but not icons!!
and that’s it.
What we do understand for ";icon";???
1.- An important and enduring symbol
2.- One who is the object of great attention and devotion
3.- symbol of anything considered holy and divine
4.- an object of uncritical devotion
To me ";icon"; means something really important+well known+with a long tradition.
1.- L’Ermita and Pingus are not yet ";icons";, they are at the moment cult wines but they still have to do a long, long way before acheaving the status of ";icon";
2.- Tondonia, has well the long long way, but lacks the ";holy and divine"; status world wide!!!, it is an really good wine but in mho is not a top, so it is not an icon.