I am deleting large amounts of data from a database table and i want it to be as quick as possible

I would like to try the following

        Use MyDatabase
        set transaction isolation level read uncommitted
        Go
        Delete from temptable where mark =2023
        PRINT 'Number of rows deleted is ' + CAST(@@ROWCOUNT as char(3));

But i am not sure , is “read uncommitted” the best to set it at when deleting large amounts of data ?
Will this have an impact on users if they are trying to write to the database ?
Or is there a different isolation level to set it at ?