That's a kind of character you could do with the Warlord class, in 4e, usually with some of the build options that gave you the 'LazyLord,' It's a good example of, well, literally a sub-class a sub-set of the things the full class should be able to do. Of course, the class should also do the Bravura builds who /were/ badasses in their own right, too.
...ooh.. sub-classes...
...let's compare notes!
Extant 'builds' from 4e:
Inspiring, the most literal 'leader' take and the concept most covered by feats &c in 5e, so far, all about CHA, best at restoring hps.
Tactical, the most military-leaning 'comander'ish take, MM's partial Fighter-sub-class design of the 'warlord' limited itself to this INT-based build.
Bravura, lead-by example combat bad-ass, a risk-taker who encourages the same in his allies.
Resourceful, planning an material preparation, down with Combat as War - and improv when the plan contacts the enemy.
Skirmisher, mobile scout/woodsman/guerilla, who can keep the party together & sticking to those tactics rather than go on ahead by himself.
Insightful/Watcher, observes & predicts enemies actions, understands their motivations
community ideas:
Icon ('LazyLord' - I like Garthanos's 'Princess Build,' but y'know, gender), it's not so much what the Icon does, as what they represent to the party. Can include the plucky side-kick who inspires by trying, even if he'll never be in the same league as his allies.
Marshal, commander of masses of faceless troops (could be a 'pet class' with a swarm-like template pet, or could be saved for a wargame spin-off, like it's namesake was in 3e)
Artillerist, an archer himself & an organizer of ranged-weapon & spell volleys
Teacher, advocate of a martial philosophy, not just practical tactics or techniques
Protector, the trope of the 'leader' who puts the lives of his allies first
Hector, inspired allies, but also goads and out-maneuvers enemies into making mistakes.
...
5e-style faux-MC sub-classes
Crusader - divinely-inspired to bring the faithful together for victory (cleric/palad)
Arcane Battlemaster - on the battlefield, leverages the most powerful of all resources: magic. (wiz)
Infernal Strategist - victory at any price, even your soul (warlock)
Thaneborn - traditional tribal leader who incites berserk fury in his allies (barbarian)
Ardent - telempath, projects inspiriation/courage/etc to his allies (Psion)