You can stick with Edgar Markov and build an aggressive Vampire deck by adding more lords, Shared Animosity, and other aggressive tribal-matters cards, or you can go with Licia, Sanguine Tribune and build lifegain combo with Sanguine Bond, Exquisite Blood, Defiant Bloodlord, and the like
So many that it was banned in Commander for years
Mew is fairly modest, hitting for 20 and revealing the opponents hand, but Mew ex has a Ditto-like ability to mimic any attack of your opponents active card, and for three Normal energy, meaning it can be used in any deck of any stripe
Aside from that win condition, its regular attacks provided the heavy-hitting versatility needed to trade blows with other massive GX threats
Fog (and Friends) The classic option to prevent all combat damage is Fog, which has interestingly seen several functional reprints that were color-shifted in Ethereal Haze and Darkness