My favorite is “Jesus, meek and humble of heart, make my heart unto Thine.”
I also remember a few other ones from an ancient prayer book (printed in the '40s). I discovered it when I was as a child and I couldn’t understand the meaning of “300 days each time, Leo XIII” or “100 days once a day, Pius IX” - the old indulgences usually attached to most ejaculatory prayers.
What I remember from that prayer book:
“Sweetest Jesus, be not my Judge, but my Saviour.”
“Blessed and praised every moment be the most holy and Divine Sacrament.”
“O Jesus, my God, I love Thee above all things.”
“O Mary, thou didst enter the world without stain, do thou obtain for me from God that I may leave it without sin.”
I also like a Rosary for the Poor Souls that consists entirely of such ejaculatory prayers. I have it on a file, but I don’t remember the link to the original source (surely a Trad. site), so here it is, with the obsolete indulgences included:
THE ROSARY FOR THE POOR SOULS
On the Cross: De Profundis or Pater and Ave.
On the Large Beads: V. Eternal rest give to them, O Lord. R. And let perpetual light shine upon them.
Act of Faith: My God, I believe in Thee, because Thou art Truth itself.
Act of Hope: My God, I hope in Thee because Thou art infinitely good.
Act of Charity: My God, I love Thee with my whole heart and above all things, because Thou art infinitely perfect.
(7 years and 7 quartines each time. Benedict XIV., Jan 28, 1756. Plenary, once a month, if said every day. Benedict XIII., Jan. 15, 1728.)
(Plenary, In articulo mortis—at the point of death—if frequently used during life. Benedict XIV., Jan 28, 1756.)
On the Small Beads: Sweet Heart of Jesus, be my love.
(300 days once a day. Leo XIII., May 21, . 1892.)
Sweet Heart of Mary, be my salvation.
(300 days each time. Pius IX., Sept. 30, 1852. Plenary, once a month.)
At the end: Jesus, meek and humble of heart, make my heart like unto Thine.
(300 days eaclt time. Pius IX., Pro Ma. Jan. 25, 1868; Pius X., Sept. 15, 1905.)
Our Lady of the Sacred Heart, pray for us.
(100 days each time. Pius X., Br. July 9, 1904.)
St. Joseph, model and patron of those who love the Sacred Heart of Jesus, pray for us.
(100 days once a day. Leo XIII., Dec. 19, 1891.)