The most interesting from the players handbook: Shocking grasp, Blade ward, Protection from good/evil, Misty step, Mirror image, Counterspell, Haste, Fireball, Greater invisibility...
Other good spells: Mage armor (Dex), Firebolt (STR), Minor illusion, Mage hand, Message, Poison Spray (if you can pick warcaster feat), Chill touch, Expeditious retreat (Dex), Silent image, Darkness, Gust of wind, Blur, Alarm, Protection from energy, Fly, Charm person, Disguise self...
Other books have very good spells like Booming blade, Green flame blade and Absorb elements.