We all know and love the amazing doctors at Grey Sloan on Grey's Anatomy, from brave Meredith Grey to tough-as-nails Miranda Bailey. There's no doubt that the doctors drive the drama on the show. Still, you have to admit that the guest actors who star as patients can get you all caught up in your feelings as well, especially when they cut deep into the complicated emotional lives of the beloved surgeons. Who could forget Scott Speedman's portrayal of dreamy Dr. Marsh or Mandy Moore's grounded performance as sweet Mary Portman? Read on to see our favorite Grey Sloan patients who've checked in and made us fall head over heels in love, sob profusely into our pillows, and everything in between!