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Antares is a red supergiant very near the ecliptic, so it gets occulted (blocked) by the Moon quite often. Also, Antares weighs septillions of tons and is losing weight through solar wind, but this method is slow. The fast way is to explode, which it'll do later.

V354 Cephei is a red supergiant, and it's huge. If placed in the Solar System, it would extend out to the asteroid belt. 354, in addition to being in this star's name, is also the year Augustine of Hippo was born.

La Superba is one of the reddest stars in the night sky. It is so red because of all the carbon-13 it creates when fusing helium. (Normal carbon is carbon-12.) La Superba is only 2700° C, making it one of the coldest stars.

The Pistol Star is one of the most luminous stars known. In twenty seconds, it radiates as much energy as the Sun does in a year. Interstellar dust prevents us from seeing it. It's called the Pistol Star not because of its luminosity, but because it's in the Pistol Nebula.

Mu Cephei is very red. It is sometimes referred to as "Herschel's Garnet Star" because it is garnet red. Another alternative name is Erakis, if you don't like the first two names.

KY Cygni is 200,000 times more luminous than the Sun, and the Sun is pretty luminous, isn't it? The Sun is so luminous you aren't supposed to look at it! However, it's okay to look at KY Cyngi because it is 300 million times farther away.