He was consecrated on October 28, 1919.
There has never been a Pope Pius XS.
Pius XI was pope until he passed away on February 10, 1939. He was followed by Pius XII who became pope on March 2 of that year.
Pius VI
He was elected on March 2, 1939.
If by "leader" you mean "the pope," then the leader of the Catholic Church in 1958 was either Pope Pius XII, who's reign ended in that year, or Pope John XXIII, who succeeded Pope Pius XII in that same year.
Becket was ordained and consecrated as Archbishop of Canterbury (and therefore head of the Church in England) on 3 June 1162. The Pope was overall head of the Church in western Europe, including England.
He became archbishop of Munich and Freising on March 24th, 1977.
He was ordained in 1977.
Catherine of Siena was canonized in the year 1461 by pope Pius II.
We do not know exactly when Pope St. Stephen I was born but it was probably late in the second century or very early in the third. He was consecrated pope in the year 254.
He was appointed Archbishop of Munich and Freising in 1977 by Pope Paul VI, and created a Cardinal that same year.
In 1798 he was captured. In fact he also signaled a temporary break in the power of the Roman Church!