Favorite Elf-King?

[Maedhros]

If you examine Turgon's rôle in ME, he is the perfect example of someone who only acted when it was convinient for him to do so.

From the Published Silmarillion

The field was lost; but still Húrin and Huor and the remnant of the house of Hador stood firm with Turgon of Gondolin, and the hosts of Morgoth could not yet win the Pass of Sirion. Then Húrin spoke to Turgon, saying: 'Go now, lord, while time is! For in you lives the last hope of the Eldar, and while Gondolin stands Morgoth shall still know fear in his heart.'
But Turgon answered: 'Not long now can Gondolin be hidden; and being discovered it must fall.'
Then Huor spoke and said: 'Yet if it stands but a little while, then out of your house shall come the hope of Elves and Men. This I say to you, lord, with the eyes of death: though we part here for ever, and I shall not look on your white walls again, from you and from me a new star shall arise. Farewell!'

but then we have ........
From the Wanderings of Húrin

Then Húrin looked up to the grey sky, thinking that by fortune he might once more descry the Eagles, as he had done long ago in his youth. But he saw only the shadows blown from the East, and clouds swirling about the inaccessible peaks;
and wind hissed over the stones. But the watch of the Great Eagles was now redoubled, and they marked Húrin well, far below, forlorn in the failing light. And straightaway Sorontar himself, since the tidings seemed great, brought word to Turgon.
But Turgon said: 'Nay! This is past belief! Unless Morgoth sleeps. Ye were mistaken.'
'Nay, not so,' answered Sorontar. 'If the Eagles of Manwë were wont to err thus, Lord, your hiding would have been in vain.'
'Then your words bode ill,' said Turgon; 'for they can mean only that even Húrin Thalion hath surrendered to the will of Morgoth. My heart is shut.' But when he had dismissed Sorontar, Turgon sat long in thought, and he was troubled, remembering the deeds of Húrin. And he opened his heart, and he sent to the Eagles to seek for Húrin, and to bring him, if they could, to Gondolin. But it was too late, and they saw him never again in light or in shadow.

Now this is convenient.