The Blank Slate
The Fighter is the most popular class in Adventurers League, and honestly, that tracks. What’s harder to explain is why it still feels underrated at your average table.
The Case for Boring
New players tend to skip the Fighter. Warlocks have a patron. Druids turn into bears. The Fighter just, well, fights. That apparent lack of personality is actually the whole point. No alignment assumptions, no cosmic allegiances, no spell list telling you who you are. You get a weapon, a fighting style, and a blank canvas. Samurai, cavalier, battle-hardened general, shady mercenary; none of that is baked in, all of it is available.
The Fighter is vanilla ice cream. That sounds like an insult until you realize vanilla ice cream goes with everything.
Where It Actually Gets Good
Second Wind and Action Surge both come online at levels 1 and 2 respectively, which makes the Fighter one of the strongest early-game classes at the table. A lot of classes are still finding their footing at level 3. The Fighter is already doing its thing.
Action Surge is the feature that rewards creative thinking the most. Yes, at high levels it produces a genuinely horrifying number of attacks; four base attacks doubled by Action Surge gets you to eight in a single turn, and at level 20 you can do that across two turns for sixteen total. But the move that actually saves parties is using that extra action to Dash, disengage, or set up something nobody expected. An action is an action. The Fighter just gets more of them.
The Battle Master archetype is worth your time if you want some texture to go with all that damage. It introduces maneuvers, gives you actual decisions to make mid-combat, and rewards you for paying attention to positioning. If the base Fighter feels like painting by numbers, Battle Master hands you the paintbrush.
The Multiclass Argument
As a multiclass dip, the Fighter is almost unfairly good. Extra Attack and Action Surge benefit nearly any other class that can make use of an attack action. All armor and shield proficiencies come along for the ride. You are not weakening your character by taking a few levels of Fighter. You are almost certainly making it more durable and more flexible.
The Fighter’s reputation as a simple class is not wrong, exactly. It is more accurate to say it is a foundational one. If you want to understand action economy, this is the class that teaches it to you.
For further reading on archetypes including Battle Master, Eldritch Knight, and Cavalier, see the Player’s Handbook Chapter 3 and Xanathar’s Guide to Everything.