Neither I nor the OP have much experience with that build. Can you share more about how it works and why it is a good grappling choice?I am saddened by the fact your include SCAG races, but not the best grappler subclass in the game: Battlerager.
Pretty cool stuff. I can see that this would be a fun class to be. I'm not sure about it being the best grappler, however. Grapplers excel at locking down opponents and controlling the battlefield. The more you take your focus off of that target and move it onto other things, such as dealing damage, the less effective you will be at your primary focus. Nothing wrong with being moderately good at two things instead of very good at one thing, but it's generally not the way to make the most potent build.Well I'll just tease the first couple of abilities (scanning my copy of the book was the best idea ever):
BATTLERAGER ARMOR
When you choose this path at 3rd level, you gain the ability to use spiked armor (see the "Spiked Armor" sidebar) as a weapon.
While you are wearing spiked armor and are raging, you can use a bonus action to make one melee weapon attack with your armor spikes against a target within 5 feet of you. If the attack hits, the spikes deal ld4 piercing damage. You use your Strength modifier for the attack and damage rolls.
Additionally, when you use the Attack action to grapple a creature, the target takes 3 piercing damage if your grapple check succeeds.
RECKLESS ABANDON
Beginning at 6th level, when you use Reckless Attack while raging, you also gain temporary hit points equal to your Constitution modifier (minimum of 1). They vanish if any of them are left when your rage ends.
Ah screw it, why not a third:
BATTLERAGER CHARGE
Beginning at 10th level, you can take the Dash action as a bonus action while you are raging.
Good questions. There's definitely no exact answer, but I can share my own experience. I have 5 grappling characters:...
Also, love the guide, but I wish there was a bit more on multiclass builds or even some sample builds. Anyone have suggedtions on that? Like is there a reasonable way to combine the grappler-gold bits like rogue experise, barbarian rage, and fighter action surge/battlemaster moves? Or would a build like that be shooting itself in the foot by giving up other goodies?
That is true. If you go that route, I'd recommend you aim for Fighter 1/ Bard 3 first. With advantage and one attack, you can at least grapple and throw opponents off of cliffs or take two rounds to knock them prone. At Fighter 2 / Bard 3 you unlock Action Surge, which allows you to lock down one opponent in one round at least once in a while (and combos really well with Earth Tremor). Then maybe go Fighter 4 / Bard 3 to pick up Tavern Brawler so you can pull off the one attack - trip - bonus action grapple combo. That's only 1 level later than a pure bard or barbarian/rogue would be in getting the ability to grapple and knock down an opponent in one turn.That's great info, thanks for all the detail Goken100! Really helped me see how build options can play out.
At the moment, I'm planning to try a Bugbear grappler. Currently torn between going the Battlemaster Fighter / Lore Bard route and the Barbarian / Rogue route. The Fighter / Bard seems like a bit more fun for me, and I love the thought of having the versatility of BM maneuvers and Bard spells when not grappling. However, the fact that I'll have to get to L8 (F5/B3) before I really hit my stride with grappling is a drawback; when it seems like if I go Barbarian 5 / Rogue 1 I can have all the tools (advantage, 2nd attack, expertise) pulled together 2 levels earlier.
Decisions, decisions.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.