Of course, there were other good speeches; examples are from Donald Trump, Jr., "Rudy" Giuliani, and a few others. However, I'll stick with the four I mentioned as the best. Others are offered below only as support to statements I make.
After the videos there is an addition. Frank Luntz works for FOX by running focus groups of ordinary voters to gage their reactions. The additional video is of the focus group's views obtained after the convention concluded.
Here is Ms. Ingraham's:
Laura Ingraham's Speech
Newt followed Ted Cruz' speech. Cruz had taken an pledge/oath to support the Republican nominee for president. He broke that pledge.
He offered the American people to "vote their conscience" - he did NOT suggest they vote for Trump.
Here's the pertinent portion of Cruz' speech:
Or, if you would prefer a simple picture that kind of sums up Cruz and his oath,
Now, Trump was well aware of Cruz' entire speech prior to its being given. Trump let him speak anyway. Good move on Trump's part - Trump had the right to refuse to let Cruz speak.
Throughtout the primary season Trump referred to Cruz as "Lyin' Ted". By letting Cruz violate his oath, Trump proved that he, Trump, was correct in his assessment. Further, by allowing Cruz to vilolate his oath before a national audience, Cruz basically doomed any future political career in the Republican party. "Well played, Donald".
As mentioned, Newt followed Cruz on the podium. Newt ad libbed a bit before he began his speech. Newt basically, with a little humorous intent, tried to interpret what Cruz must have meant.
Now, here is Newt Gingrich's speech:
Now, for the focus group's views. Luntz assembled 20 people who claimed to be undecided before joining the group. I say "claimed" because a couple of people expressed that they were "Never Trump" people. These may not have decided for whom they would vote; but, seem to have come in decided for whom not to vote.
The group was comprised of Republicans, Democrats, and Independents. The focus group was filmed live; i.e., there was no editing or filtering of their remarks. Pay little attention to Luntz' summation at the end - he offered his opinion; and, he is entitled to it. Just pay attention to what the focus group said.
Anyway, I found the results fairly suprising - especially when asked who NOW would vote for Hillary Clinton.