Here are a few to get started with:

Libertarian Freehold - no Meritocracy civic
Anarcho-Capitalism - no Meritocracy civic
Entrepreneurial Council - no Meritocracy nor Aristocratic Elite civics
Merchant Republic - no Meritocracy civic
Constitutional Plutocracy - no Meritocracy civic

Innovation Initiative - becomes Rationalist-Managerial Firm on Scientific Management and Educational Consortium

(These ones relate to Institutionalized Collectivism)
Proletarian Regime - becomes Constitutional Dictatorship
Automated World-Commune - becomes Totalitarian Regime
Insurrectionary Lineage - becomes Star Empire
Populist Monarchy - becomes Constitutional Dictatorship
Social Bureaucracy - becomes Plutocractic Oligarchy
Socialist Plenary - becomes Plutocractic Oligarchy
Syndicalist Conference - becomes Plutocractic Oligarchy
Social Democracy - becomes Representative Democracy
Agrarian Commonwealth - becomes Representative Democracy
Communal Democracy - becomes Representative Democracy
Syndicalist Congress - becomes Representative Democracy

Market Socialism - Workers' Councils (Libertarian) and Merchant Guilds (Fanatic Competitive) are incompatible

It should be noted that Meritocracy and Aristocratic Elite do still exist, they are just slightly renamed as Governmental Civics, of which you can only have 1. In addition, Sophisticated Meritocracy (the new name) requires Pluralism, which fights against the 3 types I mentioned because they all require Elitism in some way, IIRC

EDIT: As for the Institutionalized Collectivism ones, those are reachable as well, this just includes all of the changes from the Sanity Patch for normal E&C forks, which includes requiring Cooperative for most Socialist governments.

Good catch on Market Socialism and Innovation Initiative, though, thanks