Try out the ligature vim plugin.

nvim/.config/nvim/init.vim

@@ -4,6 +4,7 @@ Plug 'ncm2/ncm2'
 Plug 'autozimu/LanguageClient-neovim', {'branch': 'next', 'do': 'bash install.sh' }
 Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --bin' }
 Plug 'junegunn/fzf.vim'
+Plug 'enomsg/vim-haskellConcealPlus'
 
 Plug 'lervag/vimtex'
 Plug 'rhysd/vim-crystal'
@@ -30,11 +31,11 @@ autocmd FileType crystal setlocal shiftwidth=2 " Crystal likes 2-wide indent
 set completeopt=noinsert,menuone
 
 let g:LanguageClient_serverCommands = {
-            \ 'haskell': ['hie', '--lsp'],
+            \ 'haskell': ['hie-wrapper', '--lsp'],
             \ 'rust': ['rustup', 'run', 'stable', 'rls'],
-            \ 'c': ['clangd'],
+            \ 'c': ['cquery'],
             \ 'crystal': ['scry'],
-            \ 'cpp': ['clangd'],
+            \ 'cpp': ['cquery'],
             \ 'javascript': ['javascript-typescript-stdio'],
             \ 'elm': ['elm-language-server', '--stdio']
             \ }