'zealous of' is not correct or usable in written English.
You can use the phrase 'zealous for' instead. For example: The students were zealous for success.
In fact, it is advice being offered by the more zealous of today's privacy campaigners.
The most zealous of his followers are, however, neither in his satsangs nor the street demonstrations, but online.
Only the Knicks, and the most zealous of their fans, could envision games in June while the team lost twice to the Toronto Raptors in February.
Even the most zealous of Mr. Sadr's recruits, told of the ayatollah's wishes, marched out of the old city like the obedient troops that they were.
Not even the most zealous of the young rebels believed that Fidel Castro would shoot these two men, who had played such a big role in the Cuban Revolution".
In the early weeks of his premiership, his greatest concern seemed to be how best to time the withdrawals and avoid any clashes between his own police and the most zealous of the settlers.
Unlike Galveston, San Antonio, Dallas and other Texas cities, Houston has a long history of zealous defense of property rights, opposing government's efforts to limit what owners can do.
That, however, may ring a bit hollow in AMD's case, given its years of zealous pursuit of legal and administrative actions against Intel.
He criticised BAE over "allegations of corruption, zealous lobbying of British ministers, sanction breaking and incompetence".
The son of a zealous member of the Plymouth Brethren, Henson was not allowed to go to school until he was fourteen, and was largely self-educated.
Personally, I had to switch off the Adam Sandler "comedy", I Now Pronounce You Chuck And Larry, because of its barbaric view of homosexuality and zealous use of the word "faggot".
