The o Lu two worth using are Flashscore and sofascore. Both are very fast and accurate
Flashscores have everything you need. Last few weeks it was loading slow in my site but from a week I see the site is back to it's usual speed. This could be my internet service provider too to have slow experience.
"Livescore" is the website I use live to see the live scores of sports results.From the livescore. I see and enjoy all the sports results.In the meantime I can see the livescore of the sport from another website which is "Cricbuzz". I watch live cricket scores from "cricbuzz".I am giving the link of the Cricbuzz website. If you want, you can watch the live score from here.
https://m.cricbuzz.com/Cricbuzz is for only for cricket and there is espncricinfo too but I see the OP is listing only those generic site not specialized.