After that you have Elder Gargaroth which is also over $10, while theres a set of highly playable cards in the $5-$9 range including Retrofitter Foundry, Lightning Greaves, Panharmonicon, and Triplicate Titan
For example, Wrenn and Six is likely the strongest planeswalker in Legacy because of the interaction with Wasteland and the constraints that interaction along with cards like Daze put on the format in terms of casting spells that cost more than two mana
The trick, of course, is to play it in a situation where it benefits you more than any of your opponents
Your brash and (for lack of a better term) expendable crew of pirates wants to get into scuffles with your opponent, while constantly sailing from location to location to gain various benefits
This legendary human cleric can be a great payoff for a discard deck or simply a good sideboard card in a white-heavy meta
This could also include one of the 37 extended-art rares (39.8%) or 9 extended-art mythic rares (4.8%)