So many, and given I’ve spent months in hospital of late many of them relate to that.
The nurse who was in the recovery suite where I was meant to go after my surgery which didn’t happen but where I went anyway and then crashed and had to be carted off to ICU. He stayed way after his shift had ended until I was taken down, and came down the next day to see how I was.
The nurse in ICU who was with me that first night, who came down with me for a procedure they couldn’t do, who swabbed out my mouth with water because I was nil by mouth and had already been for 24 hours but wasn’t allowed anything yet in case I had to have an anaesthetic. And who had to kindly tell me I couldn’t have sedation because my blood pressure was so low that they had to know if I stopped talking meant me falling unconscious iyswim. Who very gently suggested that their aim is always to get people better when I asked if I was going to die. There was a high chance I did.
All of the other nurses on that ward over the ten days I spent in there.
The consultant from the first day (although there were many others as well) who was lovely and spoke to me and was reassuring. Apparently he’s been on 24 hours in A&E before. Pgrin]
The Chaplin who came to see me, and engaged with me in a conversation about music, and then sang me a song. At this point I should have to all accounts been unconscious but wasn’t.
The nurse who put her phone on with music so I could listen to some while I was still awake one night.
The lovely staff on the coronary ward where I was moved, who talked and chatted and who got to know me.
The DR who, saved my life when i went into cardiac arrest some days after moving out of ICU. He had to start compressions while I was still conscious in an attempt to stop my heart from arresting as the rate had dropped so low. I cried and begged him to stop (deeply traumatic experience) but he ignored me and carried on and although my heart did stop his actions meant that because the blood flow never stopped there was never any risk of e.g. brain damage, or very minimal anyway. I thanked him when he came to see me a few days later and he said “it’s my job.” 
The DR’s who did my procedures which eventually got me out of there.
My consultant who has pushed and asserted and got things done to the point that I am now well enough to live my life again but also well enough to be considered for a transplant which I was previously ineligible for and which is my only long term hope. He’s one of those who is very blunt and very assertive. But it gets things done. He doesn’t just waffle about doing things, he goes off and does them himself if he has to e.g. booking appointments and so on.
Oh and last, the nurse who used to work nights when I was in the same hospital a few years previously who ended up doing a couple of nights this time as well. I recognised him but didn't say anything, but he saw me and came over to say. hello.
There are others from the outside world but I know I've already written an essay.