(If you're up for strolling through memory lane, you can view all the reported 2007 Regionals decklists here.) But, like many others at the time, one of the first events I remember seeing Tarmogoyf making a splash in was a Tarmogoyf made the Top 8, and one ended up winning the tournament
I don't want to get ahead of myself, but this card seems shockingly good
Out of the three of them, I think Jace, Wielder of Mysteries is the perfect mix of usefulness and power: he can be played early in the game for advantage, but he also encourages combat as he can be attacked directly
Combos aside, Mikaeus gives most of your creatures a second wind when they die, and deters Humans from attacking into you
It also has synergies with +1/+1 counters or decks that care about high power or toughness