JSFiddle - React, Tailwind, and code Playground

HTML

<table border="0" cellpadding="2" cellspacing="0">
    <tr>
        <td class="variableContent">
            Variable height content
        </td>
        <td>
            <table>
                <tr>
                    <td class="checkbox"><input type="checkbox" name="baba" value="checkbox" /></td>
                    <td>Row 1a</td>
                    <td>(OC)</td>
                    <td>John</td>
                </tr>
                <tr>
                    <td class="checkbox"><input type="checkbox" name="baba" value="checkbox" /></td>
                    <td>Row 1b</td>
                    <td>(OC)</td>
                    <td>Mary</td>
                </tr>
                <tr>
                    <td colspan="4">This is where comment goes</td>
                </tr>
                <tr>
                    <td class="checkbox"><input type="checkbox" name="baba" value="checkbox" /></td>
                    <td>Row 1c</td>
                    <td>(OC)</td>
                    <td>Larry</td>
                </tr>
            </table>
        </td>
    </tr>
    <tr>
        <td class="variableContent">
            Variable height content <br />
            Variable height content <br />
            Variable height content
        </td>
        <td>
            <table>
                <tr>
                    <td class="checkbox"><input type="checkbox" name="baba" value="checkbox" /></td>
                    <td>Row 2a</td>
                    <td>(OC)</td>
                    <td>Jen</td>
                </tr>
            </table>
        </td>
    </tr>
    <tr>
        <td class="variableContent">
            Variable height content
        </td>
        <td>
            <table>
                <tr>
                    <td class="checkbox"><input type="checkbox" name="baba" value="checkbox" /></td>
                    <td>Row 3a</td>
                    <td>(OC)</td>
                    <td>George</td>
                </tr>
                <tr>
         ...

CSS

table                   {background:#e3e3e3;}
td                      {vertical-align:top; border-bottom:1px solid #999;}
td td                   {width:100px; border-bottom:none;}
td.checkbox             {width:20px;}
.variableContent        {background:#f00;}