To make the list, games must have:

Varied Offensive Options
Defensive Depth
Grounded Movement and Tactical Positioning
Good Pacing
Skill Expression
Organic Challenge
Varied Movement Options
Refined Combo System and/or Neutral Play
Environmental Interaction
Replay Value and Extra Modes
Dynamic Combat Elements
Impactful Strikes and Feedback

Genres I'm using: beat 'em ups, roguelikes, brawlers, character action, hack & slash, punchout clones, action RPGs, and fighting games... although to a limited degree since, they are too personal and have too many obtuse mechanics.


Clauses:

Innovation Clause: Groundbreaking mechanics.
Exceptional Quality Clause: For games that excel exceptionally well in certain criteria.
Genre-Specific Flexibility: Recognizes that different genres may prioritize certain aspects of melee combat over others.
Case by Case Evaluation:
-Emphasizes the importance of context in evaluating a game's combat system, ensuring each game is assessed based on its unique contributions and how well it embodies the core criteria.
-Acknowledges that a game can be exceptional in certain areas even if it doesn't meet every single criterion, considering the overall experience it offers.
-Allows for flexibility in how criteria are applied, understanding that innovation, exceptional execution in specific areas, or the successful adaptation of combat mechanics to fit a genre's conventions can all significantly enhance a game's melee combat experience.

I'm going to need way more time to incorporate every good melee game, and tend to focus on stuff with more flare first.