And what do you think about Turgon? He was one of the most powerful and noble elves, but, did he enough heroic actions along the Silmarillion tales? I mean, he builds Gondolin (by Ulmo's order, by the way, and the Vala guides him to the hidden place), but he stays there all the time, protected from Morgoth's attacks, and with an arrogant attitude when he was told to leave in the imminent fall of Gondolin.
On the other side, we have some great actions: he crossed the Helcaraxe pass and almost died trying to save his wife and he do saved his daughter Idril, he hides his armour for Tuor to find it, and his end was told as very brave although is not detalled. Also he fought in the Nírnaeth Arnoediad, the only time he went out of the city, and he was helped by Húrin to escape while all the others who stayed died.

I mean, other people like Fingolfin, Fingor or Finrod sacrified themselves if it was necessary (or not, like Fingolfin), but was Turgon maybe overprotected under the fact that Gondolin was the last hope of humans and elves?

Those were certainly perilous times Brego. And I too would have kept an eye on him, but it seems to me the very curses themselves that were put upon men and elves seemed to almost call to them, pull them in the direction of the fulfillment of the curses in varying degrees in the lives of the afflicted. Which made the hurt and horror many suffered so much worse to my mind since it seemed there was, at least in many of the cases no hope, no way out. That Frodo should come along far after and enter a sort of curse, something Sauron might have said over anyone finding and keeping and using the One Ring and by a series of miracles , no other word comes to me, he should somehow make it to the end and not receive the natural recompense due to him for failing at the end, is just marvellous. It gives the whole age of men a shine, a splendor that not even the beginning of things following creation by Illuvatar had for me. For in the beginning as it were there was always the fear of something going amiss in paradise and it surely did. Whereas from Frodo on there  was a hope not felt before.

I thought everything about Gondolin was magical and fearful and wonderful all at the same time. The characters were all larger than life, complex, and I am astonished at how most every one seemed stubborn to the point of self destruction, only a few free from this destructive pull upon their minds and hearts.

Gondolin was built on the memory of the beauty of the West.  We must remember that Turgon was reluctant to leave until his hot blooded sister gave an inspired and fiery speech.  And at the end of the city, Maeglin had the same pride in what he had created just as Turgon had in his shining city.  And i believe he and many others of the Noldor knew that they would have to pay a very heavy price to receive any help from the Valar.  I think Turgon knew his hidden stronghold would fall as soon as he saw his armor on Tour.  But i also think he was just as proud of the joining of Elf and Man in his house.  Wasn't it inspiring to look across the Tumladen at the Tower of the Fountain glimmering in the setting Sun?. . .

The pride of the Noldor, in my opinion, was a curse in and of itself.  Feanor's oath brought so much heartache on his family, yet I think he would of been proud of it.  And my favorite prince, Finrod Felagund, his pride is why he fulfilled his oath to Barahir and brought about his death fighting wolf-Sauron defending Beren.  Yet that is why I love him so and can only hope I am "Elf" enough to do the same! 

I think the overwhelming power of the oath his why Maedhros, my favorite son of Feanor, did his best to remove it from the world and bring the doom to an end.  I can only hope that the motives and reasons are remembered by Mandos and he treats his wards accordingly.

Turgon was a brave and careful elf, and oh the splendour of Gondolin.

Shame that the city was destroyed by Morgoth.

But as for The Noldor, this part from Blind Guardian's song called 'Noldor' kind of explains some of it all.

'I know where the stars glow, skies unclouded, sweet the water runs my friend

Noldor, blood is on your hands. Tears unnumbered, you'll shed and dwell in pain.'