Cleric - Wanderlust Domain
Far Traveler, by Alix Branwyn
The Wanderlust Domain is for itinerant preachers, clerics whose calling is to travel far and wide in service of their deity.
The Wanderlust Domain serves the role of a traveling priest, someone with an explicit mission of roaming far and wide - maybe to proselytize, but maybe just to be where their god needs them at any given time.
Design-wise: The spell list here is heavily geared towards utility - usually I try to make them more balanced, but that's pretty tough with this theme. Sanctity of the Road is a nice little speed boost and a flavor feature. Press Onward gives you bonus movement and almost-a-free-disengage whenever you cast a leveled spell. Both of those aim to be in the sweet spot of "interesting, maybe a fun dip, but not wildly powerful". Crushing Fatigue is definitely the most unique piece here - take some exhaustion yourself to give your enemies more. It gets less punishing after 6th level, but early on, you're giving yourself a mild-but-significant penalty in exchange for potentially dropping a bunch of enemies' speeds by half in a way that's very tough to recover from. Travel Companion amps up Press Onward, and turns it into a tool for the whole party, not just yourself. Itinerant Healer gives you better management on your own exhaustion, and potentially gives the party a big boost in forced marches or other tough travel. Potent Spellcasting is table-stakes; in many ways Divine Strike might be a slightly better thematic fit, but armor proficiencies wouldn't be, so cantrip-boost it is. Holy Wanderer, at high levels, gives you a ton of movement power in combat and effectively amps up your channel even more.