That's a useful list, thanks for sharing. What would be useful is if there was just a distribution of Vim that just had everything included for a specific language. Or at least a base and then a way to discover and add more from within Vim.
There are definitely distributions, for instance SpaceVim. I've got my own configs shared in GitHub but I'd prefer not to reveal my identity. I'm sure there are plenty to be found.
There are plugins made for a language, but they are usually bloated, it's cleaner to compose smaller plugins to achieve the same outcome.
Usually vim configs are like toothbrushes, everyone uses a special one. Here's mine that includes dozens of plugins, some of them repeated from colordrops' list:
w0rp/ale
junegun/fzf
junegun/fzf.vim
majutsushi/tagbar
scrooloose/nerdtree
jistr/vim-nerdtree-tabs
erahhal/nerdtree-ack
tpope/vim-commentary
joegesualdo/jsdoc.vim
Raimondi/delimitMate
tpope/vim-surround
vim-scripts/AutoComplPop
Shougo/deoplete.nvim
carlitux/deoplete-ternjs
marijnh/tern_for_vim
Rip-Rip/clang_complete
SirVer/ultisnips
tpope/vim-fugitive
mhinz/vim-signify
vim-scripts/DirDiff.vim
sheerun/vim-polyglot
pangloss/vim-javascript
vim-utils/vim-man