Here is my default TSConfig configuration for the htmlAREA RTE. I use this one in combination with a typical (default) configuration in the Extension Manager with images enabled.

RTE {
    default {
        proc.entryHTMLparser_db = 1
        proc.entryHTMLparser_db.tags.table.fixAttrib.cellspacing.set = 0
        proc.entryHTMLparser_db.tags.table.fixAttrib.border.set = 0
        hideTableOperationsInToolbar = 1
    	buttons.toggleborders.keepInToolbar = 1
        showButtons (
		bold, italic, underline,
		left, center, right, justifyfull,
		orderedlist, unorderedlist,
		line, link, image,
		table, findreplace, chMode,
		copy, cut, paste, undo, redo, toggleborders,
		tableproperties, rowproperties, rowinsertabove,
		rowinsertunder, rowdelete, rowsplit,
		columninsertbefore, columninsertafter,
		columndelete, columnsplit, cellproperties,
		cellinsertbefore, cellinsertafter,
		celldelete, cellsplit, cellmerge
	)
	toolbarOrder (
		bold, italic, underline,
		left, center, right, justifyfull,
		orderedlist, unorderedlist,
		line, link, image,
		table, findreplace, chMode,
		copy, cut, paste, undo, redo, toggleborders,
		tableproperties, rowproperties, rowinsertabove,
		rowinsertunder, rowdelete, rowsplit,
		columninsertbefore, columninsertafter,
		columndelete, columnsplit, cellproperties,
		cellinsertbefore, cellinsertafter,
		celldelete, cellsplit, cellmerge
	)
    }
}

TCEFORM.tt_content.bodytext.RTEfullScreenWidth = 100%