I don't think there's room for everyone's vision of the Warlord, hybridized into one overarching Frankenclass. It'll suffer from 5e ranger syndrome
There's not that much variation in the concept of the class, it's not like the Ranger, that's been in a sub-class in multiple editions and a full class in two, and, varied from an Aragorn to a Grisly Adams to a Drizztz to a Robin Hood to a half-caster Druid over that time. There's one vision of the Warlord that's seen print.
Realistically, an encompassing Warlord needs a way to support Str, Dex, Int, and Cha at a minimum as being usable as primary stats for combat functions. 5e doesn't have any pre-existing template to support that level of stat support.
STR/DEX is easy, any class with a fair range of weapon & armor choices can go either way. It's one of the things D&D has really gotten 'right' this time around: not attaching any sort of 'tax' or class-niche-protection to light-armor-viability or DEX-based-offense in melee or STR-based offense at range.
INT/CHA has some possibilities. If the class is mostly designed around choice of maneuvers, some could use INT as a secondary stat, others CHA, and some either.
5e is also less locked into choosing only a single secondary stat, being generally open to more than 2 'high' stats, especially if Feats aren't opted into.
You might be able to do it with a class structure with a loose skeleton, and most of the power features put into various subclasses. But I think at least two Warlord-style classes would be more elegant; one to support strong combatant Warlords, and one of the more mental stat focused "princess" or "lazy" style warlords.
Either might be viable. Or the strongest strong-combatant (Bravura) concepts could be palmed off on the Battlemaster, maybe with the help of more BM-useable Manuevers, or perhaps yet another archetype with more 'Defender' style mechanics, and the actual Warlord focus more on the Tactical, Inspiring, Resourceful, Insightful, Skirmishing, and Princess/Lazy sorts of builds (the Archer build from MP2 could arise more or less naturally out of 5e's treatment of STR/DEX in combat).
There's certainly no shortage of un-tapped design space for such things.