Recommend me best hosting

Hi i hot a website which is too heavy in size, it has 30k+ posts, 40k+ media,more than 100 pages and 50 plugins. I am going to start its optimization but i ma confused what hosting should i shift it to, so i can get best speed. Can you recommend a solution to this and also any cache plugin or optimization solution you may think is best. Your suggestion are welcome 🫠