Hearthpwn

Hey, could use some help. Just pulled a golden Leeroy Jenkins but I dislike playing Aggro so don't think I will hang on to it. I only have the LoE Legendaries, Sylvanas Windrunner and The Beast.

I play mostly control Priest, tempo Warrior and Midrange Hunter type decks, and I am a few gold away from unlocking the last wing of Blackrock Mountain so planning to incorporate some Dragon. However I thought it might be better to get some staple neutral classic legendaries good for control since I have basically nothing.

After some research I am between Alextrasza , Ysera and Ragnaros the Firelord. Any advice on which of these are most useful in the meta?