There are many ways to modify data labels display, please see some API options to consider (the list is longer, please go through the options):

• rotation: https://api.highcharts.com/highcharts/series.column.dataLabels.rotation
• inside: https://api.highcharts.com/highcharts/series.column.dataLabels.inside
• align: https://api.highcharts.com/highcharts/series.column.dataLabels.align

You can also play with font size via https://api.highcharts.com/highcharts/series.column.dataLabels.style

You can even target the position of a specific point if needed, see an example here: https://jsfiddle.net/BlackLabel/fp4otydc/

And with the use of dataLabels.formatter option you can apply alternate positions in many ways, one example is here:

dataLabels: {
        enabled: true,
        formatter: function() {
            // Alternate y position for labels
            let yOffset = this.point.index % 2 === 0 ? -10 : 30;
            return `<span style="position: relative; top: ${yOffset}px;">${this.y}</span>`;
        },
        useHTML: true,
        style: {
            fontSize: '13px',
        }
    }

Let me know if that is what you were looking for!