One of the vs One of

Some examples from the web:

• One of the investigators disappeared under mysterious circumstances.
• One of the bullets damaged his spine.
• One of the founding families actually.
• One of the most common complaints about therapy.
• One of the ingredients is kryptonite.
• One of the commonest instruments in chemistry laboratories.
• One of the steam locomotives is named Culdee.
• One of the main challenges was regulating conductivity.
• One of the most up-to-date techniques is bioremediation.
• One of the founding families actually.
• One of the activities is psychological counselling.
• One of the victims was hospitalised.
• One of the directives relates to renewable energy.
• One of the most popular viewers worldwide.
• One of the wonderful windows inside Salisbury cathedral.
• One of the most important elements of flavour.
• One of the restaurants is nonsmoking.
• One of the safest charging technologies worldwide.
• One of the most popular long-distance cycle routes.
• One of the many crocodile fish, Papilloculiceps longiceps.

Some examples from the web:

• One of the world's best.
• One of life's great unanswerable questions.
• One of your finest, mass-produced...
• One of 4 spikes always faces up.
• One of the ingredients is kryptonite.
• One of my greatest teachers was my grandfather.
• One of my favorite examples of collaborative lifestyles is called Landshare.
• One of my favorite cartoon characters is Snoopy.
• One of your followers killed my girlfriend...
• One of my favorites is Sepultura from Brazil.
• One of their secure facilities was penetrated.
• One of our brothers died this morning.
• One of your patients was found murdered there.
• One of the founding families actually.
• One of their obsessions was eye color.
• One of your customers left his billfold.
• One of my biggest fears is dying ironically.
• One of our men died holding this.
• One of your contestants died last night.
• One of my patients suddenly started crying.