Top 10 Force Feats of Destruction

Indeed, I forgot about that. Also, what about that failed Sorceress' ritual on Ambria?

1. Naga Sadow's feat of making a Star go supernova comes at top. But this was made possible through the use of some ancient Sith crystals wielded like a superweapon.

2. Darth Nihilus and Vitiate reducing an entire planet to barren wasteland with extremely powerful expressions of Force Drain. Both planets were harmed beyond the point of recovery.

3. A massive expression of Wall of Light scorching the surface of planet Yavin 4. Thousands of Jedi pulled this off collectively.

4. Palpatine's showings with Force Storm. Though below the scale of Ziost and Katarr based events, one of the Palpatine's Force Storms destroyed an entire fleet of Starships and a military compound of the Alliance.

"One of the Emperor's Force Storms destroyed the Alliance base on the moon of Da Soocha and the entire fleet above it. Every day I'm reminded how lucky we are that Palpatine is lost to Chaos forever." (Luke Skywalker)

5. Abeloth's feat of destroying the Sinkhole station

6. Exal Kressh's actions that led to fall of a massive Space Colony on the surface of the planet below.

7. Darth Bane and several Sith, collectively, setting large swaths of land on fire on Ruusan.

That last one was more of a chain reaction than anything, though.

The Thought Bomb (maybe even the earlier wildfire ritual in PoD) are still worth mentioning as some of the most destructive feats of the Force ever, just of a lower magnitude.