Transform A List of Records into a Table

Have you tried Table.FromRecords?
With a 'Source' similar to 

Table.FromRecords(Source)

gets you...

If you only want specific fields from the records you can add a step after the source.

As an example choosing the first and third columns would end up with this example code...

let
    Source = 
    {
        [First="value from row 1 column 1", Second="value from row 1 column 2", Third="value from row 1 column 3", Forth="value from row 1 column 4"],
        [First="value from row 2 column 1", Second="value from row 2 column 2", Third="value from row 2 column 3", Forth="value from row 2 column 4"],
        [First="value from row 3 column 1", Second="value from row 3 column 2", Third="value from row 3 column 3", Forth="value from row 3 column 4"],
        [First="value from row 4 column 1", Second="value from row 4 column 2", Third="value from row 4 column 3", Forth="value from row 4 column 4"]
    },
    select_fields = List.Transform(Source, each Record.SelectFields(_, {"First", "Third"})),
    convert_to_table = Table.FromRecords(select_fields)
in
   convert_to_table

 end a result of...

=Table.FromRecords(yourRecordList,Record.FieldNames(yourRecordList{0}),2)