-

2gua.rainbow-brackets
alefragnani.project-manager
alexkrechik.cucumberautocomplete
amazonwebservices.aws-toolkit-vscode
awesomektvn.scratchpad
aws-amplify.aws-amplify-vscode
bungcip.better-toml
castwide.solargraph
christian-kohler.npm-intellisense
dbaeumer.vscode-eslint
dunstontc.vscode-rust-syntax
eamodio.gitlens
eg2.vscode-npm-script
esbenp.prettier-vscode
felipe.nasc-touchbar
flowtype.flow-for-vscode
freebroccolo.reasonml
gamunu.vscode-yarn
GitHub.vscode-pull-request-github
hbenl.vscode-test-explorer
jtr.vscode-position
lannonbr.vscode-js-annotations
littlefoxteam.vscode-python-test-adapter
mhutchie.git-graph
ms-azuretools.vscode-docker
ms-pyright.pyright
ms-python.python
ms-vscode.cpptools
ms-vscode.Go
ms-vscode.vscode-typescript-tslint-plugin
msjsdiag.debugger-for-chrome
naco-siren.gradle-language
noku.rails-run-spec-vscode
Orta.vscode-jest
rebornix.ruby
RomanPeshkov.go-test-outline
rust-lang.rust
streetsidesoftware.code-spell-checker
vadimcn.vscode-lldb
VisualStudioExptTeam.vscodeintellicode
vscodevim.vim
windmilleng.vscode-go-autotest
wingrunr21.vscode-ruby
zxh404.vscode-proto3

This is the output of code --list-extensions

Some of these are less essential and part of specific investigations I did. I recommend just going down the list and adding ones that make sense for you.

Non language based ones I use almost daily are alefragnani.project-manager and eamodio.gitlens