I put some thought into this back before The Last Jedi’s title was announced, and ended up suggesting it for a couple of the earlier films. I wanted to keep the titles as Original-Trilogy-Star-Warsy as possible without spoiling any plots.

RETURN OF THE SITH. Sith already a scary word, this implies an old threat coming back.
Clone Wars only really start at the end. But nothing really happens in this one. So could swing towards the relationship between ObiWan and Anakin (MASTER AND APPRENTICE, emphasising the training and that each have their own arcs in this film), or even something force-y, like DARK SIDE OF THE FORCE, as enemy plans increase and Anakin gets tempted. Maybe LURE OF THE DARK SIDE. Or DARK FORCE RISING.
TWILIGHT OF THE REPUBLIC: Implies the Clone Wars come to a major end, a falling, the start of a new chapter, but without giving away the plot like ‘Rise of the Empire’ might
3.5) Rogue One is OK.
A New Hope is pretty good, but maybe The Last Hope, or even THE LAST JEDI, to show off how far hope has fallen and how dire things are. Or even REBEL STRIKE, though the action comes fairly late. Not convinced.
The Empire doesn’t even strike back in this film. Other than attacking a single rebel base. But it’s not really a retaliation. What happens? They flee Hoth, Luke trains in Dagobah, Vader captures them at Cloud City, Dad fight. So, no idea. LURE OF THE DARK SIDE could work here.
THE LAST JEDI could also work here, since Obi Wan is dead, Yoda dies/is in hiding, and it emphasises the odds against Luke. Though you have been told ‘there is another’ in Empire.
The force does awaken in a couple of people. But I like SHADOW OF THE EMPIRE because it shows the resurgent threat, and reminds you that the First Order is just the Empire reborn.