Yes, those are good ones.
How about these?
The Blob - both the '80s and the '50s versions. In the '80s version the blob sucks a guy down a sink drain. I was frightened of the kitchen sink for weeks after seeing that as a kid.
Invasion of the Body Snatchers - any version. I like the '70s version most. There's a fun '90s version by Abel Ferrara, too, set on an army base.
The Thing - again, there are two versions. The original '50s version, by Howard Hawks, is a classic, possibly THE classic, creature invasion story. It involves scientists and army men in an arctic station working out how to defeat the intelligent plant-like alien that attacks. John Carpenter's '80s remake is one of the scariest movies of the '80s. I think everyone's heard of it.