Whilst I have grown to like him over the last few months, I do understand why others feel the way they do about Harry getting a HEA. However, I have to say, I do think that Mary Claire definitely deserved a happy ending as much as any of the other characters mentioned above who didn't get one. I would also like to have seen most of those characters get Happy Ever Afters too and it is unfortunate that they didn't. I do think it was the ideal ending for Mary Claire's character, as she had been consistently unlucky in love from her arrival and was clearly smitten with Harry from his arrival. I'd think of the storyline more as him manning up and finally realising how amazing she was and deciding to follow her, rather than her settling for someone who wasn't good enough for her. I also like how they went to Chicago to follow HER dream job rather than her following Dr Harry on some career related trip. I liked the idea that he had to follow her and Norman to Chicago, rather than the exit being a plan devised by him.
Incidentally, whilst I am very pleased (particularly for the fans) that Janny got a lovely, happy ending, I am not entirely sure that Jac or Jonny 'deserved' it any more than Harry and certainly not as much as MC. Don't get me wrong, I absolutely love Jac as a character and am very much looking forward to seeing her again, but she has done some fairly awful things to colleagues etc throughout her tenure, eg offering to sell Darwin colleagues out when it looked like plastics would be a speciality, blaming Chrissie for her own mistake, some would argue the way Elliot was treated over Herzig. etc etc... Whilst she's had a hard time by way of retribution, she has progressed right up the career ladder and now has lovely family unit at the end. I am very pleased re all of this as I love the character, but it could definitely be argued by many that she wasn't as deserving of the happy ending as some of the characters mentioned, particularly someone like Dianne.
Re Jonny also, again I like the character (albeit not as much as either MC or Jac), but he was pretty awful to Jac over Emma's custody, downright nasty at times and we've never had any indication that he's learned from his behaviour at that time. Yes he's had the suffering of losing Bonnie, the imprisonment, stabbing etc etc but still many might argue that he deserved a happy ending less than many other characters who didn't get one.
Harry also has had a fair amount of retribution for his earlier bad deeds lately: the near death fall, the initial facial injuries (which I have to agree have recovered pretty well!) Calum being taken off to Singapore, nearly losing his career when Raf lied so in many ways he has also had quite a lot of pay back in a short time too.
Essentially, I am delighted that all four characters got HEAS as I have been significantly invested in them all as individuals. However, I think MC was the most 'deserving' of a HEA and in my opinion whilst Harry did get the whole package in the end, he did leave Holby to follow MC to her dream job and in many ways is no less deserving of a happy ending than Jonny and possibly Jac too. Although, I certainly agree that there is an argument that neither Harry, Jac or Jonny were as deserving as many of the others mentioned who didn't get them. Just my opinion though! I am quite happy that they got them whether they were technically 'deserved' or not.