Thanks for your question. I will try to help.
If both you are your employer told them about you leaving you role then I would normally also expect to hear from them, but they are not particularly reliable or efficient.
The gap between when you left your role to leaving on the 02/12/2017 is fairly substantial and I would be much more confident that you would have to no issues if the gap between you leaving your job and then leaving the UK were around a month.
However, if it is the case that you simply did not hear from them about when you should leave the UK and had to take some time to sort out your affairs in the UK before you left, then you might still be able to argue that you left as soon as you possibly could but you will certainly have to cover this point when you apply for your visa. If you were emotionally strained because of the bereavements then it would not hurt to also state this.
Provided that you left your role for personal reasons and not any illegibility or misconduct and you generally observed the immigration rules whilst in the UK then you still stand a reasonable chance of obtaining a new tier 2 visa provided that you explain the gap between when you left you role and when you left the UK.
Obviously, you will have to find a new job and sponsor but provided you do this you can attempt to apply.
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