L Junius Brutus and M Junius Brutus are both high on the list, though rather better known than Zrinski, who I'd never heard of before.
Lucius was the founder of the Roman republic, and traditionally the first consul of Rome (cf. Aenied, Book VI: "He shall be the first to recieve the power of consul and the cruel axes.")
He led the revolt against Tarquinius Superbus rex, after the Rape of Lucretia, who was a member of his family. After being sent off to fight in one of Rome's endless wars, he heard about Lucretia's rape, and returned to Rome, where he took up the dagger with which she had stabbed herself, and shouted for the overthrow of the Tarquin line. After forcing them into exile, he put power into the hands of the Senate, with himself as one of the two original consuls.
After executing both his sons for failing in their duties to the republic, Brutus was killed in a battle to prevent the Tarquins returning to Rome, killing the son of Tarquinius Superbus at the same time.
Marcus was descended from the same line as Lucius, and famously conspired with Cassius and others to assassinate Julius Caesar on the Ides of March. In the civil war between Pompey and Caesar, Brutus allied himself with Pompey, and Caesar ordered his soldiers not to harm him, and if he resisted capture to leave him alone. After the civil war, Brutus wrote to Caesar, who forgave him for fighting for his enemy, and he became one of his closest friends, known to be a champion of freedom and the republic.
After Caesar had finally persuaded the senate to make him dictator for life - a post normally only held for a limited time during a crisis - Brutus was exhorted by Cassius and others to join them in plotting the death of Caesar, in the name of two of his famous ancestors: Lucius Brutus, who founded the republic, and C Servilius Ahala, who killed Spurius Maelius, who was claiming to be king.
After the death of Caesar, Mark Antony pardoned all of the assassins, but Brutus fled to Crete amid the public outcry. When Octavian became consul, he reversed this decision, and called the murderers of Caesar enemies of the state.
Cicero wrote to Brutus about the internal tensions in the republic, between Antony and Octavian, and Brutus gathered his legions to march on the republic. However, Octavian made peace with Antony, and the two crushed Brutus' army at the battle of Phillipi, although he won the first engagement. Brutus committed suicide before he was captured, and Antony had him wrapped in a purple robe and cremated.